trek madone 9 weight

Trek Madone SLR 9 Disc review

Cycling Weekly has shown that the Trek Madone is one of the fastest aero bikes available today, but has the update with discs made it even better? I certainly think so

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The Trek Madone SLR 9 Disc is a great bike – it feels like a technical masterpiece you can live with every day; of course you won't want to ride to work on it! The ride feels quality and it truly does want to take off. The added adjustable ISOSpeed is a great idea and the fact it doesn't hinder anything else, other than add a little bit of weight, is no bad thing. Great work Trek!

Ride quality

Performance

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It is clearly one of the fastest bikes on the market, even a year since its launch. I really enjoyed my time with the Trek Madone and would happily have it back for more riding. Fast, capable, great handling and surprisingly comfortable for such an aggressive bike and that is why it is in for Editor's Choice again.

It's the year of the aero bike as Trek follows suit and launches an updated version of its wind-cheating machine, the Trek Madone SLR 9 Disc.

This is the sixth Madone iteration, the first being launched back in 2003, and although a lot of you might be crying out that it looks exactly like the fifth  Trek Madone,  launched in 2015, it has in fact received many updates despite that similar silhouette.

>>> Best carbon road bikes

The main thing you see here is of course the disc brakes for the new Madone, but you’ll have a rim-brake version to choose from if you so wish, something that other major brands have chosen to avoid. This is because the American brand believes the customer should have options and, truly, the jury is still out on disc brakes.

https://www.youtube.com/watch?v=_H2kJb7rIiM&t=265s

Although it follows the same silhouette of the last year's Madone, the new Trek Madone SLR utilises a new geometry fit. The new H1.5 shape is something that Trek says was asked for by the riders and was developed with the women’s pro team, Trek-Drops. It means more riders can fit the Trek Madone SLR and with a choice of low or high-stack stems you should be able to get a similar fit to the older geo (H1 low, H2 high).

>>> Is women’s specific geometry still relevant in 2018?

With this you get a new two-piece handlebar and stem that offers full cable integration but also versatility. The most impressive thing is that you can get a 5° tilt on the handlebar, something I’ve wanted to see on aero handlebars for a while now. Being two-piece means you can get the right stem length to match the right handlebar width, very important for all us fussy cyclists.

The bars are nicely shaped, the tops are comfortable and feel relatively stiff when out the saddle sprinting – overall a very nice design.

Riding the new Trek Madone SLR 9 Disc

Aerodynamics

What impressed me the most is how fast the bike feels. This is really tangible, even against the likes of the Specialized Tarmac that does in its own right feel lightning quick (and the older version of the Venge ViAS) that I have been riding recently. The bike just flies!

Cycling Weekly's  in-house testing of the last model of the Madone found it to be the fastest bike aerodynamically, closely followed by the  Specialized Venge ViAS , which has also now been updated for the better in 2018 if a little more dramatically than the Trek Madone.

Does the Madone still remain the fastest aero bike available? That is yet to be seen although, according to Trek, it is in fact faster than the previous version despite the inclusion of disc brakes. According to Trek, between 10 and 20 grams of drag has been saved when compared to last year’s rim-brake bike but in the real world this is fairly negligible, representing a watt or two saving at most.

But what I want to know is why Trek hasn't used leverless thru-axles? I mean, it has taken care of every aspect of the bike but sticks a large lever on one side? I just don't get it.

Some of that quick nip will be down to the new wheels and tyres from Trek-owned Bontrager, which provides the Bontrager Aeolus XXX 6 tubeless-ready disc brake wheels and Bontrager R4 320 tyres that even sound fast as you're swooshing along.

Sadly, I haven't been uploading anything to Strava (I know, not on Strava didn't happen right?) but the Trek Madone SLR has felt effortless to ride and you can't help but cruise at 20mph without hinderance.

And the best thing is it doesn't come at the price of handling or comfort.

Comfort v stiffness

Straight out on the road you can tell the Madone is a racing bike. It is hard and fast, so if you are looking for a sofa to sit on, look elsewhere. That isn't to say it can't be a comfortable ride too.

As the Trek Madone SLR 9 Disc now comes with the IsoSpeed decoupler fitted to the top tube so that aerodynamics isn’t compromised but ride quality can be improved, you can tune comfort levels to suit you, whether dictated by terrain, rider weight or rider preference.

This according to Trek also allows for the ride qualities of the frame to be the same across all the sizes.

I initially thought this would mean issues for the consumer: don't give people a choice because it surely creates more complications down the line; just make a bike that is compliant and stiff. How very wrong I was!

In its softest setting it yields 17 per cent more compliance than the older Madone and in the hardest setting it is 21 per cent stiffer. A damper has been added around the seatpost to help reduce rebound by around 13 per cent.

I've ridden the Trek Madone SLR 9 Disc in various IsoSpeed modes to discover what difference to the rear it would make. I learnt that I probably wouldn't ride in the stiffest setting as it was a little too harsh at the rear for me. At that point it was very similar to the likes of the  Giant Propel  in terms of rear-end feel – a little uncomfortable and I needed the odd out-of-the-saddle break.

Towards the middle and softest setting was my preferred mode and I could altogether forget I was riding such a racing machine, let alone an aero road bike that more often than not is too hard to ever be called comfortable.

To be frank about the bike's stiffness, I couldn't really tell that I was getting anything less from the bike in the softest setting, it still whipped up a storm no problem.

However, unlike the Giant it propelled me down descents like a dream. I didn't feel that chatter that stiff aero bikes can suffer from around the bends when pushed, whereby you are skipping across the surface of the tarmac instead of remaining planted and gripping firmly around the corners. It has enough compliance to hold the bends and offer up plenty of ride feel to keep you aware of what is going on underneath.

The Trek Madone SLR 9 Disc Weight-wise we’re looking at around 1,000g for a 56cm frameset according to Trek and my size small 52cm complete is 7.5kg on our scales, which is competitive for an aero bike and is in large part thanks to the use of the high-end and much respected OCLV 700 carbon, the American brand’s highest-grade carbon – although there are lighter aero bikes out there.

That 7.5kg weight isn't felt that much though, even on the climbs, and the bike feels light on its feet, which thanks to the performance and stiffness of the frame helps the bike's feel enormously.

There isn't much you could do to bring it down, I fear. Wheels of course could be replaced with lighter ones if that is what you are after; maybe sticking some lighter components on such as the saddle etc. But I don't think that's needed here. You get plenty of advantage from the aerodynamics so that you don't need to concern yourself too much with weight – but as I say there are lighter aero bikes on the market.

Trek has done an amazing job with the Trek Madone SLR 9 Disc. The American brand has just improved on that, even more, which can only mean I give it a 10/10 to match the £11,050 price tag.

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Symon Lewis joined Cycling Weekly as an Editorial Assistant in 2010, he went on to become a Tech Writer in 2014 before being promoted to Tech Editor in 2015 before taking on a role managing Video and Tech in 2019. Lewis discovered cycling via Herne Hill Velodrome, where he was renowned for his prolific performances, and spent two years as a coach at the South London velodrome. 

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Trek Madone 9 Series first ride review

Aero speed without the usual compromises.

You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

This article originally appeared on BikeRadar 

2016 Trek Madone - What we know, what we expect

Gallery: Bauke Mollema's Critérium du Dauphiné Trek - a closer look

New Trek Madone 9 Series gets radically aero for 2016

Video: New Trek Madone 9 Series

Aero road bikes might slice through the air with relative ease but as a category, they're not exactly known to be comfortable or light. The new Trek Madone 9 Series should go a long way toward dispelling that reputation with a super sleek and comparatively feathery chassis that's not only fast but freakishly cushy on rough roads, too. We've only logged a few hundred miles on our long-termer so far but initial impressions are extremely favorable.

Click here for further detail on the Trek Madone 9 series

• Highs: Cuts faster through the wind but without beating you up along the way, fantastic handling, still impressively light
• Lows: At least interest rates on second mortgages are still low
• Buy if: You want to get there in less time but still want to be able to ride the next day, too

Fast and smooth

The first two rides on this bike were on the 'dairy roads' surrounding Trek's global headquarters in Waterloo, Wisconsin. It's a seemingly endless expanse of sinuous tarmac that's gloriously free of traffic but also relatively coarsely paved with plenty of frost heave and other imperfections that often seemed perfectly sized to swallow a road tire – not exactly an ideal proving ground for a bike that's anything less than smooth.

Such deep-profile tubes wouldn't normally suggest a smooth ride but the new Madone is remarkably comfy

But alas, the new Madone isn't just comfortable “for an aero road bike” but comfortable, period – no caveats required. Despite appearances to the contrary, the deep-section carbon frame ably damps road buzz but it also rounds off bigger and harsher bumps in a way usually only expected of more traditionally shaped bikes.

It doesn't take long before you how you're seeing all of those bumps but not really feeling them through the rear end – and in fact, I even found myself consciously aiming for stuff I would normally avoid if only just for the novelty. Credit goes entirely to Trek's awesome IsoSpeed 'decoupler' – a mechanical pivot at the seat tube-top tube intersection – and the Madone's clever dual, nested seat tube design that, in combination, allows for much more flex at the saddle than you'd otherwise get out of a more traditional frame.

Trek's excellent IsoSpeed 'decoupler' strikes again, and to great effect

Unlike on Trek's similarly IsoSpeed-equipped Domane endurance platform, which incorporates an even cushier rear end but can sometimes feel somewhat harsh up front, the new Madone delivers up a more balanced and cohesive feel front to rear. It might not be as comfortable out back as a Domane but then again, as a full-blown race bike, it should be firmer and more communicative.

That all said, riders interested in an aero road bike aren't going to be considering ride quality as their primary metric – we're talking about free speed, after all, and this new Madone seems to have that in spades, too. We haven't had a chance to verify Trek's drag claims – specifically ones comparing it to its major competition – but repeated runs on my regular fast-and-flat test loops surrounding BikeRadar's US offices in Boulder, Colorado have certainly returned consistently lower times relative to non-aero machines. As expected for this segment, the chassis is plenty stiff, too.

The front end is fantastically sleek

Helping matters further is the Madone's impeccable handling. A slight variation from Madones of yesteryear – and identical to the current Emonda – this new Madone 9 Series is nevertheless equally adept at carving up sinuous mountain descents or gobbling up long stretches of straight road, feeling utterly composed and competent throughout.

Reigning it in

Boulder isn't exactly known for being flat, however, and the countless canyon roads to the west also demand plenty of braking. Thankfully, the new Madone's proprietary center-pull rim brakes are not only cleanly integrated into the frame and fork for aero purposes but they also work well – a good thing since there are no other options.

The dedicated centerpull brakes work well with generous power and control, plus fantastic lever feel

Caliper flex is practically nonexistent thanks to short and compact aluminum arms and a fully boxed-in layout that bridges the ends of the direct-mount pivots. Meanwhile, the cable wedge moves on rollers while both pivots are fitted with cartridge bearings to return a silky smooth and light lever feel that's noticeably devoid of excess friction.

Total braking power leaves a little to be desired with the Bontrager carbon-specific cork pads included here and they're also prone to squealing but modulation is very good. We'll likely switch to a set of SwissStops as the long-term testing progresses.

A look at the inner workings

Clearance is great, too. Trek officially says the new Madone will swallow tires up to 28mm wide and rims up to 30mm wide (external measurement), depending on the exact combination.

Sweating the details

Another usual pitfall of proprietary componentry is lack of compatibility. In that sense, there's no grand departure here as the Madone's dedicated aero-profile one-piece carbon fiber bar and stem won't work with aftermarket computer or camera mounts, and the similarly aero-profile no-cut extended seatmast won't take anything other than the dedicated Bontrager head.

The aero cockpit is actually quite comfy to hold

But on the upside, Bontrager has at least given the cockpit an agreeable shape with versatile semi-anatomic drops and flattened tops that you can still comfortably wrap your hands around. And while Trek says it's faster to leave the tops untaped, the subtle 'Madone' graphics are sized such that you can still wrap them up as usual without looking funny.

Likewise, there may not be much in the way of seatpost options but at least the one included is easy to live with. Bontrager's updated head design now features truly independent tilt and fore-aft adjustments, and so far, it's held rock solid.

Custom mounts are included for lights, computers, and cameras

And as for accessories, Trek even includes custom mounts for computers, cameras, and lights for the cockpit and seatmast – meaning you can still attach your favorite gadgets but won't have to look at any unsightly clamps or rubber straps.

Such an obsessively hidden internal cable routing setup – it's all fully concealed save for a short section of wire for the rear derailleur – is certainly going to be more challenging to service when the time comes but Trek has at least made bar height adjustments less easy. As compared to other similar setups that require a full recabling, Trek has cleverly fitted the new Madone with custom split headset spacers.

Split headset spacers should make for relatively painful height adjustments

Unflappable build kit

Trek will initially offer the Madone 9 Series in several standard builds but BikeRadar got an early sneak preview at the upcoming Project One custom version – which, in this case, doesn't stray far off the beaten path in terms of components or wheels but definitely goes off-center visually with a very non-standard green-on-green paint scheme.

There's not much that needs to be repeated on the Shimano Dura-Ace Di2 group: it's functionally without fault with perfect shifts each and every time. It'd still be nice to have some more tactile feedback from the shift buttons but that's still a matter of personal preference.

As usual, the Shimano Dura-Ace Di2 transmission is superb

Bontrager's latest Aeolus 5 D3 TLR tubeless-compatible carbon clinchers are proving to be great all-rounders, too, with a newly widened tire bed that mates well with the 25mm-wide Bontrager R4 tires used here. As we've noted before, the blunt, 50mm-deep rim shape is fast yet manageable in strong crosswinds. Their weight is also quite good although as with all tubeless-compatible Bontrager hoops, the chunky molded plastic rim strips add nearly 100g per set.

All told, this 52cm H1 test sample came in at just 6.79kg (14.97lb) without pedals or bottle cages.

Raising the bar

Overall, Trek's new Madone 9 Series is off to a fantastic start to its long-term test: it's fast, remarkably comfortable, and easy to live with. Unfortunately, the prices have climbed in lockstep with the technology but at least Trek will offer several somewhat more reasonable options with identical shaping but lesser build kits.

Not all riders will feel any burning need to go aero but when that extra speed comes with so few compromises, the arguments against it certainly become less compelling. Ever-increasing retail costs? That gets a big 'boo' from this end but the idea that aero road bikes can also just be really good road bikes in general is a trend I can get behind.

Faster, comfier, easier to live with.

Complete bike specifications

Frame: 2016 Trek Madone 9 Series, H1 geometry, 700-Series OCLV carbon fiber Fork: 2016 Trek Madone KVF Headset: Integrated Cockpit: Trek Madone integrated Bar tape: Bontrager gel cork Front brake: Trek Madone integrated w/ Bontrager carbon-specific pads Rear brake: Trek Madone integrated w/ Bontrager carbon-specific pads Brake levers: Shimano Dura-Ace Di2 STI Dual Control ST-9070 Front derailleur: Shimano Dura-Ace Di2 FD-9070 Rear derailleur: Shimano Dura-Ace Di2 RD-9070 Shift levers: Shimano Dura-Ace Di2 STI Dual Control ST-9070 Cassette: Shimano Dura-Ace CS-9000, 11-28T Chain: Shimano Dura-Ace CN-9000 Crankset: Shimano Dura-Ace FC-9000, 50/34T Bottom bracket: Enduro Wheelset: Bontrager Aeolus 5 D3 TLR clincher Front tire: Bontrager R4 clincher, 700x25c Rear tire: Bontrager R4 clincher, 700x25c Saddle: Bontrager Montrose Pro Seatpost: Trek Madone 9 Series Weight: 6.79kg (14.97lb, without pedals or accessories)

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First Look and Ride: 2016 Trek Madone 9-Series

Trek shoots for the moon with its new aero road bike

It was a Friday afternoon in late May and I was sitting in the atrium of Trek’s Waterloo, Wisconsin headquarters. I was there to get my first look at Trek’s new 2016 Madone and, during a small break in the action, catching up on some email. A meeting-room door opened to my left, and I watched over 100 men and women stream out. “Company meeting?” I asked my handler, Royce Breckon, Trek’s service brand manager. “Nope,” he said, “Engineering department meeting.”

As I would later learn, Trek has about 80 engineers worldwide; when support staff is counted, Trek’s engineering department employs about 200 individuals. While not all of them were involved in the creation of the new 2016 Madone 9-Series, this gives you an idea of the resources and horsepower that the company was able to put into its new aero road bike—and most ambitious model to date.

Trek has very high aspirations for the new Madone, calling its release, "the biggest launch in Trek’s history." Its tagline is “the ultimate race bike,” and to try and reach that benchmark, Trek considered aerodynamics, handling and rider comfort.

     Related:  Pro Cyclists Debut 2016 Trek Madone 9-Series

The frame is carbon composite, naturally, and the design is highly integrated in the pursuit of (claimed) class-leading aerodynamics. The new Madone also gets Trek’s IsoSpeed Decoupler—a seat tube decoupled from the top tube and seatstays so it may flex further and more easily, increasing vertical compliance—which was originally found on the Domane.

The 2016 Madone will be offered in two variations. One uses Trek’s highest grade 700 series carbon and the company’s H1 long-and-low fit, and is made in Waterloo, Wisconsin. The second is made of 600 series carbon and uses Trek’s H2 fit–taller stack and shorter reach compared to the same size in H1–and is made overseas.

The difference, besides fit: The H1 bike is a 100 grams lighter, and in Trek’s testing appears a bit stiffer and a bit more vertically compliant; however, on the open road, the two ride very similarly, says Michael Mayer, Trek’s global road brand manager. Both are considered the company’s top of the line 9-Series frames, but Trek says the customer who wants the H1 fit is more race-oriented and desires every bit of weight savings. A women’s version will be offered; however, it uses the same geometry as the standard H2 with some spec adjustment.

Trek claims a 56cm H1 Madone frame weighs 950 grams, and that a complete 56cm H1 bike with Dura-Ace Di2 and Bontrager Aeolus 3 wheels weighs just over 15 pounds.

Aerodynamics and Integration Using an iterative process, Trek took a computer model of the first aerodynamic Madone, launched in 2013, and modified, then tested; then modified some more and tested again. Hundreds of virtual models were created, each one trying to make the Madone a bit more slippery, but always with an eye on the bike’s other performance goals. Bottle placement alone was subject to 140 iterations before arriving at the most aerodynamic position, and Trek claims the Madone is more aerodynamic with bottles than without.

Shadows of the old Madone exist. Geometry is slightly tweaked, and the new Madone’s primary tube shapes are evolutions of the KVF (Kamm Virtual Foil) truncated airfoils introduced in the previous generation. But the new Madone has a much deeper downtube, and aerodynamically shaped seat tube and seatstays where the old used round tubes.

Trek tested the new Madone against the Cervelo S5, Giant Propel, and a Felt AR in the San Diego Wind Tunnel, which Trek considers to be the best and most accurate. Ben Coates, Trek’s road product manager, stressed that the company was pursuing real-world aerodynamics, so all the bikes in the wind tunnel comparison were equipped with two water bottles.

Though the Madone was not fastest at all yaw angles (the S5 and AR eclipsed it at some), Trek’s white paper on the new Madone claims the 2016 Madone is the “overall fastest bike across all yaw angles.” Trek also tested a first-generation Specialized Venge , but didn’t include it in their comparison, “based on data collected from previous test that showed it was not a leader in aerodynamics.” How the new Madone compares to the new Venge is unknown.

Trek’s evaluation then stepped outside the virtual world and the controlled environment of the wind tunnel, and into a velodrome and out on open roads. The claimed results: At 40kph, the new Madone provides a 19-watt savings over a non-aero race bike (Trek used their Emonda as a representative) in a solo time trial situation, and a 14-watt savings when drafting.

To realize these aerodynamic gains, Trek considered more than just the frame, designing dedicated brakes and an integrated bar and stem. The integrated bar and stem saves 34 grams of drag compared to a Bontrager XXX Aero bar, says Trek. The tops are intended to be ridden naked; wrapping them with tape wrecks the bar’s aerodynamics.

More drag savings, up to 37 grams, were realized by hiding the cables. They are run internally through the bar, exiting the stem just in front of the steerer clamp and immediately entering the frame. Except for the rear derailleur loop (or wire) and a tiny bit of rear brake cable, the new Madone has no exposed cables, housing, or wires.

Though the fork’s steerer tube where the stem attaches is effectively 1-1/8” diameter, it is relieved so the cables can enter the frame directly from the integrated bar. While it is possible to clamp other stems to the steerer, it is presently not possible to route the cables properly with anything else, nor use any headset spacers other than those that come with the frame. Speed and integration has its compromises.

For safety, Trek typically recommends that a fork steerer be cut so a few millimeters are exposed above the stem clamp. Doing so requires an extra headset spacer above the stem. The Madone’s stem, however, is designed with the extra spacer built in so the preload cap sits flat for less drag. Trek’s Blendr system accommodates the mounting of computers and lights to the bar.

Trek will offer 13 different versions of the integrated bar; all use the same Bontrager VR-CF variable radius drop, however, you will see some Trek Factory Racing riders with a team-only ergo-bend version. Bar widths are 40,42, and 44, all in 90-120mm lengths, as well as a 42x130.

The center pull brakes are unique to the Madone; no other brake is currently compatible with the frame. The brakes are “designed to seamlessly match the fork and seat stay surfaces, integrating with the recessed areas and allowing air to flow smoothly over the entire surface,” according to the Madone’s white paper. Though the mounting format looks similar to the Shimano direct mount standard—used by the previous Madone and Emonda—it is different enough that only Trek’s brake will work properly.

The dual-pivot brake matches the power of Shimano's excellent 9000-series brake caliper, says Trek, and leverage is adjustable for proper feel and performance with all the major component-maker’s brake levers. Wide rims are no problem, says Coates. Independently adjustable arm position allows the brake to, “work with every rim on the market today.”

After taking a trip down under the bottom bracket on the previous generation, the rear brake returns to the seatstays on the new Madone. Trek says this placement is a bit less aerodynamic, but easier to access and adjust, and, because of the way a wheel flexes, reduces brake rub. Almost all the hardware on both brakes is uncovered and easily accessible, and there is a lever to open the arms for wheel changes. You can’t compensate for brake pad wear by adjusting on the fly with a knob at the housing stop like you can on a typical side pull caliper. Instead, the arms must be moved closer to the rim with a hex wrench.

One of the more curious details of the new Madone are the “vector wings”. Government regulations state that a bike’s front wheel must be able to turn up to 65 degrees from center, even though a rider would almost never turn the bars that far when riding. However, the shape that Trek desired for the head tube, with internal cable routing for the front brake, did not allow this much rotation. The solution was a cover with sprung wings that accommodate this amount of steering. When the bar is turned far enough, the wing is pushed open by the brake; when the bar is turned back, the wing snaps closed.

“Ma-domane” Historically, one of the biggest complaints about aero bikes is an unrefined ride feel. Trek’s solution: Borrow the IsoSpeed Decoupler from the Domane. But Trek ran into a problem in applying it to the new bike: The aerodynamically shaped seat tube (the Domane’s seat tube is round) could not flex enough to provide worthwhile vertical compliance. The solution was to give the Madone a second, internal seat tube.

While the exterior “seat” tube is a structural part of the frame, the seat post is attached to second tube hidden inside the exterior tube. That way, the exposed part of this system is aero shaped, but it transitions to a round, bowed tube inside the frame. Anchored at the bottom bracket shell on one end and with the IsoSpeed decoupler at the top, the interior seat tube can then bend under load, providing about 20mm of vertical compliance; double that of its nearest competitor, claims Trek. Overall, Trek says the 2016 Madone has the same amount of vertical compliance as the Emonda, however, the Domane is about 50 percent more complaint than both.

Trek will offer two seat mast lengths, and two offsets, 5- and 25mm. The saddle clamp is all new, and provides independent adjustment of tilt and fore/aft position.

More Than Just Numbers Echoing a theme we’re hearing more often from more companies, Trek looked beyond just the on-paper numbers when refining the Madone’s feel and handling. The Madone’s white paper, available at Trek’s website, goes into detail on the topic, but here’s a summary based on my conversations with the people involved in the Madone’s development.

To collect real world data about the loads on a bike in typical riding situations, Trek builds aluminum test models and equips them with strain gauges to measure deflection, power meters, and speed and cadence sensors. Test riders subject the bikes to routine events: climbing, sprinting, and cornering, etc., while data recorders collected information from the sensors about the bike’s behavior in response to the events. Trek used this real world data to evaluate computer models, and to be sure the simulations they run on the frames provides an accurate picture of the way a bike would behave in the real world.

Using this method, Trek’s engineers could build several versions of a frame, each having different characteristics. Test riders then provided feedback about each frame’s desirable and undesirable traits. Essentially, the models gave Trek the tools to identify and tune the nuances that add up to what riders call “feel.”

In designing the new Madone, Trek took feedback from its pro factory racing team riders who said they really liked the way the Emonda rode. Thanks to its testing process, engineers had a good idea of what contributed to these positive characteristics, and they built much of that into the new Madone, even though the latter’s tube shapes are much different.

Then, in January 2014, Trek had its factory team riders evaluate three prototypes of the new Madone, each with a different carbon layup. That feedback was taken and used to further develop the new bike. A year later Trek had “full production” versions, again in three different layups, tested by the team again and used the feedback to lock in the final layup of the production 2016 Madone.

At the bike launches I attend, there is almost invariably some slide or discussion about drivetrain, head tube and torsional stiffness and how much awesome-r it is than the previous generation frame and/or competitor’s frames. But Trek’s people didn’t talk much about the Madone’s stiffness at the launch. My impression: They weren’t specifically gunning to achieve a benchmark in a certain test, or notable gains over the previous Madone, or exceed that of competitor’s frames. Their primary concern, I felt, was achieving the ride and handling goals that fulfilled the bike’s purpose, and they seemed quite confident that those goals were met. The resulting stiffness, measured in the traditional ways, is what it is—or so it would seem. They did let on that the Madone is, “a bit stiffer than an Emonda, and less stiff than a Domane.”

The Rest Aerodynamics, IsoSpeed and feel are the three points Trek is emphasizing with the new Madone, but there are other notable details as well.

The frame can accept up to 28mm wide tires. Yes. An aero frame with rim brakes that takes 28mm tires.

The Control Center is flat-out nifty. Found high up the down tube where it is accessible on the fly, it houses an electronic shifting system’s junction box (with Shimano, the junction box button for adjusting trim and to fine-tune shifting is accessible) or, for mechanical, contains a front derailleur cable-tension adjuster. When it’s time to charge the Di2, the charging port is accessed by releasing a catch, popping open the Control Center. Note: The frame is compatible with Campagnolo EPS drivetrains, but the battery must be mounted on the outside of the frame.

Carried over from Trek’s other models is its chain retention device (though the Madone’s is “more aerodynamic,” of course), DuoTrap speed and cadence sensor pocket, and BB92 bottom bracket.

Trek also incorporated a few Easter Eggs into the Madone’s paint. I don’t want to spoil the surprise so I’ll leave them to you to find.

Four complete bikes are offered, three with H2 geometry. All use the same brake calipers and integrated bar. Sizing now mirrors the Emonda. Seven sizes, 50-62cm, are offered in H1; and nine from 47 to 64cm in H2. - Madone 9.2, $6300, built with Shimano Ultegra 11 mechanical and Bontrager Paradigm aluminum wheels; - Madone 9.5 $8400, built with Shimano Dura-Ace 11 mechanical and Bontrager Aura 5 carbon wheels (aluminum brake track); - Madone 9.9 $12,600 built with Shimano Dura Ace Di2 11 and Bontrager Aeolus 5 carbon wheels. Also offered in a women’s version.

Also offered is the Madone Race Shop Limited $13,650, a replica of the bike the Trek Factory Racing team rides, with H1 geometry, Shimano Dura Ace Di2 and Bontrager Aeolus 5 carbon wheels.

The Madone in H1 and H2 fits are also offered through Trek’s Project One paint and parts customization program starting in August. The amazing, hot-pink abomination you see in the photos (note that Trek painted it in the colors I requested) was a H2 Project One dreamed up by yours truly.

Also offered is a frame module–brakes, one-piece bar and stem, and seat mast included–for $5,780 for the H1 and $4,730 for the H2.

How it Rides The new Madone H2 Project One came to the office for a couple of our most experienced testers to spend about a week each on the bike. Off the bat, we were impressed by the bike’s ride quality. One tester compared the bike to the Domane Classic, calling the ride “silky and smooth”; another said there was “good, aggressive-type, road and surface feedback with surprising smoothness—there were no instances of rough chatter over the odd bump.” They also noted that the bike felt very connected to the road, and that even when road conditions deteriorated, the tires tracked and stuck to the ground. The IsoSpeed decoupler gave the feeling of occasionally bottoming out—letting us know that it was indeed working. There was also no brake rub under sprinting, climbing, or pedal mashing.

The new Madone is also surprisingly comfortable: “I could be happy riding it all day, or for an hour crit,” was the comment. The bike handled precisely, and was easy to control over the road.

And of course, it felt fast. On one race-like weekly group ride, a tester observed that he seemed to be able to pedal less than others in the group, all else being equal, and that on a shallow downhill where he normally coasted at a steady speed, he felt like he was actually accelerating.

Overall, the impression came back that the Madone didn’t feel like an aero bike in the ways we typically expect: The ride wasn’t harsh and chattery, the bike was stiff, and while it didn’t feel feathery, it wasn’t heavy, either. As one tester put, “This just felt like a really nice road/racing bike.” And as another said, “It’s just an easy bike to like.”

The Ultimate? Is the 2016 Madone “the ultimate race bike”? Time may tell, but frankly, statements like these are usually unverifiable. Here’s what I know so far: It’s awesome to see Trek finding a bit of swagger and flexing its muscles. I can’t imagine the Trek of just a few years ago going for it they way the company did with the new Madone. This is an impressive bike. And, based on testers’ feedback, it is a great-riding bike. The Bicycling staff races, and loves racing, but we all ride more than we race. And when we ride, we love to go fast on great equipment. The 2016 Madone lets us do both. And it didn’t come cheap or easy—it took a lot of engineering manpower.

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Exclusive first ride review of the 2023 Trek Madone SLR 9 Gen 7 – Trek’s aero comfort revolution?

After introducing the 2023 Trek Madone SLR with its unique look and promising updates, we couldn’t wait to put it to the test. We’ve now had the exclusive chance to swing our legs over the € 15,699 Trek Madone SLR 9 eTap Gen 7. Read on to find out how the new aero bike fares with the reduced weight and complexity of the IsoFlow system.

Trek claim to have developed their fastest bike yet with the all-new 2023 Madone SLR, and caused an uproar in the community while they were at it. When the first photos of the 2023 Trek Madone SLR at the Critérium du Dauphiné went live, the online community went nuts. The reactions ran the gamut from “that’s definitely a mad one” all the way to “at first I thought it was a joke, sadly it wasn’t.” There was a lot of speculation, but now we’ve finally got the first in-depth test results.

The 2023 Trek Madone SLR Disc is more than just a looker with its radical design and all-new IsoFlow system. The American brand promise a wide range of advantages and claim to have solved some of the issues of its predecessor. Trek have completely overhauled the existing IsoSpeed damping system, implemented several aero optimisations such as bigger aerodynamic compensation surfaces, according to the latest UCI regulations, and reduced the weight significantly. Besides the striking IsoFlow design, Trek obviously spec the bike with high-end components, including some from their in-house brand Bontrager, and offer deep customisation via the Project One configurator.

Trek IsoSpeed vs IsoFlow – An overview of the differences

Improved aerodynamics of the 2023 trek madone slr 9 etap gen 7.

It’s not just thanks to the new IsoFlow system that the aerodynamics of the 2023 Trek Madone SLR Disc have been improved, but also via the cockpit and therefore the position of the rider. After all, the rider produces the most wind resistance by far: riding on flat terrain, as much as 75% of the total drag is caused by the wind resistance of the rider, from speeds of just 15 km/h. So, there are a lot of gains to be made by optimising the position of the rider. As such, the handlebar of the Madone has been designed specifically for this bike, bringing the rider into an aerodynamically optimised position.

The slightly flared drops should offer improved control over the bike while also optimising the airflow over the rider’s thighs in order to reduce drag. Even the water bottles and the front mech have been integrated into the frame design, and the enlarged bottom bracket area takes advantage of the latest UCI regulations to further improve aerodynamics, like on the new Cérvelo S5 or SCOTT Foil RC .

Trek have attempted to quantify the promised gains. Accordingly, the American brand claim to save 9.3 Watts with the bike’s improved aerodynamics, i.e. the new IsoFlow system, improved tube shapes and cockpit design (without the rider). The optimised rider position alone should save around 10 W, giving you total saving of 19 Watts at 45 km/h in the drops. All these figures are relative to the 6th generation Trek Madone.

Weight optimization – How much lighter is the 2023 Trek Madone SLR 9 eTap Gen 7?

As the predecessor, the 2023 Trek Madone SLR is made of OCLV 800, which is the highest grade carbon that Trek offer. The SLR 9 with the eTap groupset weighs in at just 7.36 kg in size 56, making the 2023 Madone SLR Disc the lightest Madone Disc on the market. In total, Trek say they’ve shaved off 300 g compared to the predecessor, which would be a significant weight reduction. However, the previous Trek Madone SLR 9 Disc Gen 6 we had on test tipped the scales at 7.63 kg in size 56, so the actual weight saving is quite a bit less at 230 g, and that’s compared to a bigger frame size.

Of course, a large part of the weight reduction is down to the new IsoFlow system. Despite all their efforts, however, the Trek Émonda SLR 9 (review here) remains the lightest bike in Trek’s portfolio, weighing in at just 6.86 kg, though the latest generation of the Madone is steadily closing the gap. Whether you stand to gain more from aero or weight optimisation is heavily dependent on the elevation profile of the route, of course. On the climbs, you’ll benefit the most from the lower weight of the Émonda – especially the rotating mass of its wheels. The Madone, on the other hand, can play to its strengths on flat stages and descents.

300 g lighter than its predecessor – the lightest Madone yet.

The 2023 Trek Madone SLR in detail and models variants

The 2023 Madone SLR Disc is available in 6 different models with prices ranging from € 8,199 to € 15,699. If none of the standard models meet your demands, you can let your creativity run wild and even adorn your bike with gold leaf in Trek’s Project One configurator. The new, 7th generation Trek Madone SLR is exclusively available with electronic groupsets. You can choose pretty much freely between SRAM and Shimano, though. From SRAM, Trek offer the Rival eTap AXS, Force eTap AXS and RED eTap AXS groupsets, or the corresponding 105 R7170, ULTEGRA R8170 Di2, or DURA-ACE R9270 Di2 options from Shimano. All the SRAM equipped models also come with an integrated power metre in the cranks. Only the SL models will be available with mechanical groupsets. The SL models will also continue to rely on the old, 6th generation Madone frame featuring the IsoSpeed system, and a different carbon layup. As such, the new IsoFlow technology is reserved for the SLR range for the time being.

Supplied in-house, the 25 mm Bontrager R4 tires keep the bike grounded. These are fitted to Bontrager Aeolus RSL wheels with a rim depth of 51 mm, which, unlike the R4 tires, are tubeless-ready. Before converting to a tubeless setup, therefore, you won’t just need tubeless valves and sealant, but also new tires. Trek recommend a maximum tire width of 28 mm, which they say should give you 6 mm clearance around the tires. If you want to make the most of this clearance and fit wider tires, it’s up to you to decide how far you want to risk pushing this limit. However, doing so isn’t officially Trek approved.

Trek Madone SLR 9 2023

Specifications.

Seatpost Madone 0 mm Brakes SRAM RED eTap AXS HRD 160/160 mm Drivetrain SRAM RED eTap AXS 2x12 Chainring 48/35 Stem Madone 90 mm Handlebar Madone 420 mm Wheelset Bontrager Aeolus RSL 51 12 x 100/12 x 142 mm Through Axle Tires Bontrager R4 700 x 25C 28 Cranks SRAM RED AXS Power Meter 172.5 mm Cassette SRAM XG-1290 10–33T

Technical Data

Size 47 50 52 54 56 58 60 62 Weight 7.4 kg

The seat post and handlebar are made especially for the 2023 Madone Disc. The seat posts are available in 4 different variants. Frame sizes 47 to 54 come with a short seat post whereas sizes 56 to 62 come with a long version. Adapting the seat post length according to the frame size is necessary since the seat mast is too short to offer a wide range of adjustability. By making the seat post clamp reversible, Trek were able to maximise the adjustment range, allowing you to adjust the saddle height by 70 mm with both the long and short seat post. Unlike our test bike, the seat post is colour matched, and it comes with 0 mm offset as standard, though there’s a 20 mm offset version available.

The cockpit of the 2023 Madone SLR Disc is made of one piece. Allowing you to dial in the fit, Trek offer 14 different sizes of the one-piece cockpit, which get specced according to the frame size or the customer’s request. If that still doesn’t let you get comfortable, you can fit any stem and handlebar combination you want, as long as it relies on a 31.8 mm clamp. All you need is a special headset cover. The stock bike features a big 160 mm rotor up front and rear, making sure there’s enough braking power. Nothing has changed with regards to the cable routing, remaining almost completely hidden – you can only see a short section of the brake lines peeping out just before they reach the callipers.

As before, the 2023 Trek Madone SLR Disc is compatible with Trek’s Blendr range of lights. There’s a front Blendr mount included with the bike. Unfortunately, you’ll have to buy the mount for the Madone SLR seat post separately – we would have preferred if it was the other way around. After all, you want to be seen by other road users first and foremost. Of course, if you’re going to be training or riding day and night and in all conditions, it’s best to have both. Since it’s reliable and easy to maintain, Trek remain true to the T47 bottom bracket standard. That said, the 2023 Trek Madone SLR Disc is also compatible with 30 mm crank axles – you must just make sure that you’re using the correct bearings.

The geometry of the 2023 Trek Madone SLR Disc

As before, Trek have gone with their “moderate” H1.5 geometry for the 2023 Trek Madone SLR Disc, which sits between the more aggressive H1.0 geometry and the H2.0 variant that they use for their endurance road models. The rider gets put into an aerodynamic position predominantly via the handlebar. The bike will be available in Trek’s usual 7 sizes, ranging from 47 to 62 cm.

The 2023 Trek Madone SLR 9 eTap Gen 7 on the road – Our first ride review of the new IsoFlow aero machine

The 2023 Trek Madone SLR 9 eTap Gen 7 looks like it’s raring to go just standing there, looking like it’s in a continuous state of tension and striking a good balance between clean, simple lines and high-quality details – our high expectations of the bike were high. Once aboard the bike, you can feel the flex and pleasant level of compliance offered by the IsoFlow system. While it isn’t adjustable, the amount of flex changes depending on how far you’ve got the seat post sticking out – 77.5 cm in our case. It does a good job of filtering out small bumps, and even bigger impacts get mitigated by the bike before being passed on to the rider. There’s nothing to stop you from taking on longer tours on rough asphalt and poorly maintained roads. The comfort offered by the rear end stands somewhat in contrast to the stiff front end, only providing a bit of compliance when you’re in the drops – if you hit corrugations with your hands on the hoods, you’ll feel your teeth rattle.

Cruising leisurely aboard the 2023 Trek Madone SLR 9 eTap Gen 7, you’ll quickly realise that that isn’t the bike’s forte. At slower speeds, the handling feels slightly nervous, and the front wheel tends to tip from side to side. This wasn’t an issue when winching our way up steep climbs, but it doesn’t instil you with confidence when rolling slowly up to a red traffic light as you wait for it to turn green. When get up out of the saddle and put the hammer down, however, the bike surges forward and begs for more. The stiff bottom bracket transfers your pedalling input with minimal losses, quickly propelling the bike up to cruising speed despite the deep and therefore relatively heavy 51 mm rims. Once you’re at your desired speed, the bike will hold that pace with ease, not least thanks to the ergonomically and aerodynamically shaped cockpit: the gentle back-sweep puts you in an aero position with your elbows tucked in while the flared drops offer plenty of control and a higher level of compliance. The rounded edges of the tops are pleasant to hold on to in case you feel like assuming a more upright position. Assume the aero position, though, and the 2023 Trek Madone SLR 9 eTap Gen 7 seems to crave speed, so much so that we feared running out of gears on flat terrain.

Once you’ve summited the peak and start heading downhill, the 2023 Trek Madone SLR 9 eTap Gen 7 really comes into its own. The handling feels planted and composed at high speeds, yet it remains responsive and precise enough for spontaneous corrections in the peloton or to swerve around a pothole that you didn’t see coming. Trek have struck an excellent balance with the bike’s handling at speed. The bike does get pushed sideways by crosswinds, but it does so evenly and remains easy to control. It doesn’t get jerked around and feel nervous at all! Only the tires tend to lose traction and slide out during hard braking manoeuvres on wet asphalt – we would have preferred a set of tubeless-ready 28 mm tires instead.

You can make the bike significantly more comfortable by fitting a pair of wider tires, though it’s an excellent all-rounder in the stock configuration, nonetheless. All in all, the 2023 Trek Madone SLR 9 eTap Gen 7 has become significantly more versatile: it’s become lighter and more aerodynamic, it’s a better climber and it’s less complex thanks to the new IsoFlow system, which is a boon for both home and pro mechanics. An (almost) complete all-rounder.

Who is the new 2023 Madone for?

Whether pro athlete or ambitious privateer, criterium or steep Alpine passes, the 2023 Madone Disc is aimed at those who have need for speed. If you know Trek, you will know that the SLR range isn’t aimed at the masses, but rather at pros and all those who dream of being one – assuming you’ve got the money. Still, the components make this aero bike a superb all-rounder for all those looking to save some Watts. If you prefer flying under the radar as you enjoy your training rides, the polarising design of the Madone clearly isn’t the right choice as other riders will try to quiz you about it wherever you go. That’s exactly what some riders want, so it all depends on the type of rider that you are. Want that race feeling, but far away from traffic and asphalt? Then check out our review of the 2023 Checkpoint SLR 7 with its integrated storage compartment (find the review here).

Tuning-Tipp: downsize for more comfort, due to the longer seat post extension | 28 mm tubeless tires

Our conclusion on the new 2023 Trek Madone SLR 9 eTap Gen 7

The updates made to the new 2023 Trek Madone SLR 9 eTap Gen 7 have made it significantly more versatile. It doesn’t just look damn fast; it is damn fast, too. And the handling remains responsive at high speeds without lacking in stability. The clever new IsoFlow system reduces the bike’s complexity while offering a similar level of compliance. As such, the new Trek Madone serves ambitious (hobby) racers well and has what it takes to get you on the podium.

• very balanced handling at high speeds
• reduced complexity and improved aerodynamics of the IsoFlow system
• customisation options thanks to the Project One configurator
• high-quality workmanship

• the damping of the IsoFlow system isn’t adjustable
• the Bontrager R4 tires lack grip

Did you enjoy this article? If so, we would be stoked if you decide to support us with a monthly contribution. By becoming a supporter of GRAN FONDO, you will help secure a sustainable future for high-quality cycling journalism. Click here to learn more .

Words: Julian Schwede Photos: Mike Hunger

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Trek Madone Bikes Compared: Which One to Choose?

CyclistsHub is supported by its readers. We may receive a commission if you buy products using our links.

In this article, I’ll help you navigate the Trek Madone aero road bikes by comparing the Madone SL 6 to SLR 9 .

You will also learn:

• Who are they best suited for?
• About the differences between each model and Gen 6 vs. Gen 7.
• Why I think you shouldn’t buy Trek Madone with SRAM groupset.

Plus, I’ll tell you which model gives you the best value for your money to help make your decision easier.

KEY TAKEAWAY

Trek Madone bikes are ideal for flats and rolling terrains. They are the most aero bike family of all Trek road bikes . The models differ in components (e.g., electronic shifting or wheels) and frames. The more expensive ones are usually lighter and have a higher-grade carbon frame, but usually diminishing returns.

This article compares Trek Madone Gen 6 and 7. The main difference between Madone Gen 6 and Gen 7 is that Gen 6 has IsoSpeed decoupler, while Gen 7 has IsoFlow.

Trek Madone SL 6 vs. SL 7 vs. SLR 6 vs. SLR 7 vs. SLR 9

The following table summarizes the main differences between all Madone bikes.

Madone Pros & Cons Summary

I summarized the pros & cons of the Madone series below.

Madone Pros

• Faster than standard road bikes thanks to the aero frame
• Madone Gen 7 stands out from the crowd thanks to the IsoFlow
• Racing geometry
• Availability in multiple sizes and colors
• Integrated cable routing
• Lifetime warranty

Madone Cons

• Heavier than Émonda road bikes
• More expensive than non-aero road bikes
• No aluminum models are available
• Narrow tire clearance (28mm)

Madone Main Features

Let me now explain the most important features of the Trek Madone aero bikes.

Frame and Geometry

The Madone bikes are part of Trek’s road bike lineup . They’re made of carbon. No aluminum version of the Madone is available.

The names of the bikes have abbreviations that refer to the type of carbon used for the frame:

• SL are bikes with 500 series OCLV*  carbon (mid-range).
• SLR are bikes with 800 series OCLV carbon (high-end).

*OCLV carbon is Trek’s patented carbon fiber process ( learn more ).

SL (Gen 6) frames are heavier than SLR (Gen 7), mainly due to the IsoSpeed vs. IsoFlow ( learn more ).

The bikes are available in many sizes (47-62) and colors. They have a relatively relaxed geometry compared to the Cervelo S5 but are almost identical to the Cannondale SystemSix.

Aerodynamics

Aerodynamics evaluation is a challenging discipline because it requires a lot of resources. No extensive independent database is available that compares the speed of different aero wheels.

In Trek’s whitepaper , I learned that the Madone Gen 7 is 19W faster than Gen 6 at 45 km/h.

However, it’s hard to compare it with other bikes. But it’s rumored that Madone is among the fastest aero bikes.

For instance, in Cannondale’s whitepaper , there’s a comparison of Cannondale SystemSix (one of the fastest aero bikes) with Madone 9.9. Madone was only slightly worse.

Wheels and Tires

On some Madone models, the wheels may be different, but typically, they come with Bontrager Aeolus Pro 51 wheels.

Surprisingly, the front and rear wheels have the same rim depth. Other aero bike manufacturers often use deeper wheels in the rear and shallower ones in the front.

The same goes for tires. Madones come with 25mm tires in both the front and rear, but it’s common for competitors’ bikes to have 25mm tires in the front and 28mm tires in the rear.

Remember, the wheels are tubeless-ready, but the tires are clinchers.

Unsurprisingly, the Madone bikes have a 2X drivetrain, as is customary for road bikes.

Trek fits them with Shimano and SRAM groupsets, and the number in the bike name indicates the groupset.

• Models ending with 6 use Shimano Ultegra , 105 Di2 (R7100) or SRAM Rival AXS groupsets.
• Models ending with 7 use Shimano Ultegra Di2 (R8100) or SRAM Force AXS groupsets.
• Models ending with 9 use Shimano Dura-Ace Di2 (R9200) or SRAM Red AXS groupsets.

Interestingly, the Madones with SRAM are heavier than the Madones of the same series with the Shimano groupset. In addition, the Shimano bikes are also cheaper.

This is somewhat strange because Shimano retail prices are higher than SRAM. That’s why I recommend choosing Trek bikes with Shimano groupsets unless you prefer SRAM.

IsoSpeed vs. IsoFlow

Undoubtedly, IsoSpeed and IsoFlow have become unique features that make Madone stand out from the crowd.

The IsoSpeed decoupler aimed to improve riding comfort by absorbing road vibrations. Unfortunately, it added weight to the bike.

The 7th generation Madone took people’s breath away. IsoFlow is a significant design change from the traditional bike appearance, but it’s supposed to improve both riding comfort and aerodynamics.

On the other hand, some have expressed opinions that the change in shape from a classic triangle to a quadrilateral will inherently reduce the overall frame stiffness. Learn more in the following video.

So, which Trek Madone bike is the best?

If you’re considering buying a Madone, I suggest going for a model with a Shimano groupset. They tend to be lighter and less expensive than the equivalent SRAM models.

Consider the Madone SL 6 or 7 (Gen 7) for the best value for money. You will get an adjustable cockpit (which you won’t get with SLR Gen 7), Gen 7 frame (IsoFlow), and Shimano 105 Di2 or Ultegra Di2.

The only sacrifices you make are the lower-grade carbon, higher weight, and slightly worse aerodynamics and aesthetics due to the semi-integrated cockpit.

Trek Madone FAQ

Trek Madone bikes are for pro cyclists, competitive roadies, and enthusiast cyclists who want a unique-looking but fast road bike. They are ideal for flats, rolling terrain, and fast-paced rides (races, criteriums, etc.).

The main differences between Madone Gen 6 and Gen 7 are that Gen 6 has IsoSpeed decoupler, while Gen 7 has IsoFlow. Gen 7 frames are lighter and 19W faster at 45km/h ( source ). They also look different due to the significant design change. Trek introduced SL 6 and SL 7 Gen 7 with an adjustable cockpit in August 2023. These bikes are more affordable than the SLX versions.

The main difference between Madone and Émonda is that Madone is a pure aero road bike, while Émonda is a lightweight road bike for climbing. For more detailed info, please check out my comparison of Madone vs. Émonda .

The main difference between Madone and Domane is that Madone is a pure aero road bike, while Domane is an endurance road bike with wider tire clearance, also suitable for off-road adventures. Learn more in my Madone vs. Domane comparison.

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Trek releases radical Madone SLR, its “fastest road race bike ever”

First Published Jun 30, 2022

Trek has launched a radical new version of its Madone SLR which it describes as its “fastest road race bike ever” thanks to IsoFlow technology – with a huge hole in the seat tube – that’s said to provide dramatic aerodynamic improvements, plus a significantly lighter overall weight. IsoSpeed, Trek’s existing system for adding compliance, is absent but IsoFlow is designed to flex over bumps to smooth the ride.

This is the bike that your intrepid road.cc reporters first spotted at the Dauphiné race in southern France earlier in the month. Let’s face it, we could hardly miss it. 

Brand new Trek Madone breaks cover: exclusive look at radical aero road bike for 2023 

There’s a shedload of detail coming up so let’s get you up to speed with a few bullet points:

• Trek says the new Madone SLR is 60 seconds per hour faster than the previous generation ( see explanation below ) thanks to new aero frame shaping, a redesigned bar/stem, and a more aero riding position.
• IsoFlow is designed to improve aerodynamics, flex over bumps to smooth the ride, and save weight over previous Madones.
• IsoFlow is said to offer a similar level of compliance to the previous adjustable IsoSpeed system in its stiffest setting.
• This is said to be the lightest ever disc brake Madone, about 300g lighter than the previous model.
• Trek claims a frame weight of just under 1,000g and a fork weight of just over 400g.
• The Madone SLR is compatible with electronic drivetrains only.

Okay, let’s go through the various important aspects of the design in turn.

The most noticeable aero feature of the seventh-generation Trek Madone SLR – and the most talked about since we got pictures at the start of the month – is the IsoFlow seat tube. The tube splits in two, each section going on to join one of the seatstays. Then the seat tube resumes out of the top tube to house the aero seatpost. The pictures make things a whole lot clearer. 

The obvious question is: what the hell is going on there?

Trek’s senior design engineer Alex Bedinghaus says, “When we met with our World Tour pros, one of the biggest things that they were passionate about was: how can we make the bike lighter? They were questioning the effectiveness of IsoSpeed so we started to dig into how to make a simpler, lighter-weight system that still gives them everything they would want for aerodynamics and for sprinting stiffness.

“We did a lot of aerodynamic testing in the wind tunnel, in computational fluid dynamics (CFD), and computer modelling to figure out in which areas of the frame we could save the most drag and weight. 

“We looked at the front of the frame but this seat tube section is also really important because there's a lot of turbulent flow – a lot of chaos – going down there for the air. 

“We tried a lot of crazy things and weighed the benefits in an iterative and long process. We finally came up with this unique IsoFlow design where we have this hole through the seat tube. 

“We can accelerate the air around the head tube and into this low-pressure zone behind the rider, making the rider and bike more aerodynamic and faster. 

“It also has this cantilevered seat tube and really optimises weight, aerodynamics and compliance. It’s a unique solution that gets us to a lighter weight system than what we had before, and beats our aerodynamic goals by quite a bit.”

Trek’s director of road bikes Jordan Roessingh adds, “IsoFlow is a way to direct some high energy flow into a low energy region of the bike, and that's really what we're trying to do in aerodynamics: get rid of low energy and high drag areas of the bike. 

“When you're riding a bike, there's a really low energy area behind you. As you pedal, you create these counter-rotating vortices, and that creates a lot of drag. That [IsoFlow] hole right in front of that low energy area introduces a jet of fast-moving air that reduces the drag for the whole system.”

That’s a short explanation of how IsoFlow is designed to work. To put a figure on it, Trek says that compared with the previous generation Madone SLR, the new version will save 60 seconds per hour at 45km/h (28mph). Of course, anything travelling at 45km/h will cover 45km in an hour; what Trek means is that you'll achieve 45km more efficiently. If you ride at the same power, you'll hit 45km 60 seconds sooner.

“A ride that would take you an hour normally would take you 59 minutes on the new bike,” says Trek aerodynamicist John Davis. “If I bring that down to 35km/h (21.7mph) we still get a 59-second gain, and if I bring it down to 25km/h (15.5mph) that's a 58-second improvement from the new bike. 

“Going from the old bike to the new bike and keeping the same bar size, we’ll see about a 19-watt improvement in drag at 45km/h (28mph).”

In other words, you’ll save be able to achieve that speed while pedalling at a lower power.

“That 19-watt number, that's the whole system: the rider and the bike. About 9.3 watts comes from the bike and then 9.7 watts from the position change on the new bike.”

We’ll come back to that position change in the bar/stem section .

Other aero features

Putting IsoFlow to one side, Trek says that it has been busy developing new Kammtail profiles for the new Madone SLR.

“We have a new generation of Kammtail shapes across the bike,” says Jordan Roessingh. “We have optimisation software, and we have a supercomputer where we can run thousands of iterations of the shapes, and so we look at aerodynamics or unsteady aerodynamics to better mimic the real world. 

“We can also analyse these shapes for structural efficiency and weight. Then from those thousands of shapes, we choose the most optimal for our use case, in this case, a really aerodynamic bike that we still want to reduce the weight on. And then we can plug those in and check how they do in CFD.”

Alex Bedinghaus says, “The cockpit [ see below ] is all-new, revised for ergonomics as well as aerodynamics, and then the head tube is a little bit smoother, more structurally efficient, while still being really aerodynamic. 

“The down tube is optimised for the airflow over bottles as well as without bottles – you get the aerodynamic benefit with and without them – and the top tube is optimised in cross-section for aerodynamics. The thickness [in the middle section] of the top tube is for adding flex to the IsoFlow. It allows the seatpost member to flex a little bit more by having a thin cross-section in front of the IsoFlow. 

“The seat tube cross-section is optimised for aerodynamics and weight, and then as we transition down, there’s a shelf just below the seat tube water bottle, right above the bottom bracket, and that improves the flow of the air as it goes over the crank and the back of the bike. 

“With this bike, we added this removable front derailleur hanger, which is super cool because the drag of the front derailleur is substantial. We can give the 1x [single chainring] rider a cleaner aesthetic.”

The bar/stem

Trek has given the new Madone SLR a new one-piece bar/stem that features flared drops – so the tops and hoods are narrower than the drops. 

Find out about handlebar reach here 

“If you keep the same bar size [the width on this bar is measured at the drops], your shifters will move in 3cm – so you're faster when you're on the hoods because you're narrower,” says Jordan Roessingh, although Trek insists that the main motivation for the change is mainly ergonomic.

“Because the bar is wider in the drops, you have more control and more power in that position. There's also a new drop shape with a shorter reach [80mm] and a different curvature. It provides easier access and it’s a position that you can be more comfortable in, so you can spend more time in your drops than previously. 

“It allows you to tailor your position to what’s going on in your ride. If you want to go fast you can get on the hoods, but if you need control or power, you're sprinting, going through a corner, those drops are an awesome position.

“We tested that in the wind tunnel just to see what would happen, and [it saved] an extra 9.7 watts on top of the 9.3 watts that the bike was already contributing, so it was a bonus. 

“If you don't want to get your hands any narrower, you still get the 9.3 watts that the bike is giving you just by itself.”

Aside from the width, the handlebar/stem profiles are also shaped for aero efficiency.

“The tops of the bar include the new shapes that we came up with in our optimisation, and we did a lot of work on the stem and the spacer stack,” says Jordan Roessingh.

“They influence the aerodynamics of the rider because they're upstream of the legs.

“If you look at the flow visualisation, there's a lot of interaction of the flow coming off that, and the vortices that are created on the rider, so we did a lot of really small tweaking in our CFD and in the tunnel to optimise the shape.”

If you’d rather not use the Madone-specific handlebar/stem, you can fit any standard 31.8mm stem or bar/stem.

Weight and comfort

Okay, so Trek says that IsoFlow improves aero efficiency but IsoSpeed was included on previous Madones to add compliance, so its absence presumably affects the way the new bike feels.

Alex Bedinghaus says, “One of the biggest goals with the seventh generation Madone was to reduce weight as much as possible, so we looked all over the bike [and said]: how can we take the things that we’ve already done, the things we know work well, and simplify them?

“We took out the [IsoSpeed] pivot, we took out that unique flexing component, and we just integrated that into the way the frame is designed. The frame is [now] designed to be the flexing component. It’s stiff, it’s aero, it's lightweight, but it’s compliant in the one way we want it to be, which is the vertical compliance at the saddle.

“As we developed this awesome new IsoFlow technology, we were able to take out some of that added complexity of IsoSpeed and crank up the stiffness just a little bit. With it, we do take out a little bit of the comfort, but we add back a performance benefit to give the perfect formula of weight, aerodynamics, and compliance.”

Trek says that the Madone SLR’s cantilever design – the fact that the top section of the seat tube is attached to the rest of the frame only at one end – means that non-adjustable IsoFlow gives as much compliance as adjustable IsoSpeed in its stiffest setting. Trek also says that there will be no effect on durability as a result of this design feature.

Trek claims that the new Madone SLR is almost 300g lighter than previously across the whole bike (not just the frameset), making it the lightest disc brake Madone it has ever made. It says that about half the weight savings come from the frame and the other half from the bar/stem combo.

“Most of the gains that we see in road bike system improvements are 10g, 20g, 30g… to go to 300g is huge,” says Alex Bedinghaus. “With the previous design, we focused on aerodynamics as a whole system of the bike, so if you look at the head tube, there are larger cutouts in the previous design. We could shroud the fork or shroud the cockpit by adding a little bit of frame material that stretched above the head tube. 

“But with this design, we wanted to keep things clean so that we could be efficient [in terms of] weight and structural rigidity, so we took out some of those cutouts of the head tube. 

“The previous generation cockpit left some room for improvement [regarding] aerodynamics and ergonomics. The weight improvements of the aerodynamic cockpit are huge, and then we were able to get quite a bit of improvement over the previous frame with IsoFlow and make a really clean, elegant solution to all those weight, stiffness, and aerodynamic parameters. 

“We also use a different layup philosophy in this OCLV 800 [the carbon that Trek uses on its top-level frames] and were able to take some more weight out that way, and the new seatpost clamp also takes off quite a bit of weight.”

Trek claims a frame weight of just under 1,000g for the frame and just over 400g for the fork. Complete Madone SLR bikes start at a claimed 7.1kg. That weight refers to the Madone SLR 9 – built up with Shimano Dura-Ace Di2 – in a 54cm size.

Claimed weights for other complete bikes are in the specs and prices section (below) .

The Emonda SLR remains the lightest road bike platform in Trek’s range.

Geometry and seatpost

Although Trek talks about the new Madone offering a more aero riding position than previously, that’s down to the dimensions of the handlebar/stem; the bike retains the company’s H1.5 race-orientated geometry and all key frame measurements are the same as before.

Click on the image of the table in the gallery for a (slightly) clearer view.

The only real differences in terms of fit are the saddle rail heights that are possible on the various sizes as a result of the redesigned seatpost system.

Bikes sized 47-54cm will get a short seat post, and bikes sized 56-62cm get a tall seat post. All stock seatposts are 0mm offset (the saddle sits directly above the centre of the post with no layback).

Specs and prices

Here are details of the 2023 Madone SLR range:

Trek Madone SLR 6 Groupset Shimano 105 R7170 Di2 Wheels Bontrager Aeolus Pro 51 Claimed weight 7.8kg Price £6,850

Trek Madone SLR 6 eTap Groupset SRAM Rival eTap AXS Wheels Bontrager Aeolus Pro 51 Claimed weight 8.0kg Price £7,450

Trek Madone SLR 7 Groupset Shimano Ultegra R8170 Di2 Wheels Bontrager Aeolus Pro 51 Claimed weight 7.5kg Price £9,150

Trek Madone SLR 7 eTap Groupset SRAM Force eTap AXS Wheels Bontrager Aeolus Pro 51 Claimed weight 7.8kg Price £9,600

Trek Madone SLR 9 Groupset Dura-Ace R9270 Di2 Wheels Bontrager Aeolus RSL 51 Claimed weight 7.1kg Price £12,700

Trek Madone SLR 9 eTap Groupset SRAM Red eTap AXS Wheels Bontrager Aeolus RSL 51 Claimed weight 7.3kg Price £13,800

Trek Madone SLR Disc frameset £5,000

All of the Sram-equipped bikes include power meters.

The wheels are all tubeless-compatible, but the bikes will be fitted with standard inner tubes and non-tubeless-compatible tyres and rim strips.

Trek says that Project One customisation is coming at a later date. 

Final details

The Madone SLR is compatible with electronic drivetrains only; it can’t accommodate mechanical shift systems.

Trek says it’ll take tyres up to 28mm wide. That allows for 6mm of clearance around the tyre, so you might be able to fit something slightly wider if you wanted to.

The Madone SLR uses a T47 threaded bottom bracket, which is a standard Trek has been moving towards over the past few years.

The brakes are flat mount and the bike will take rotors up to 160mm front and rear. Like most other similar road bikes, the Madone takes 100x12mm (front) and 142x12mm (rear) thru-axles.

www.trekbikes.com

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Mat has been in cycling media since 1996, on titles including BikeRadar, Total Bike, Total Mountain Bike, What Mountain Bike and Mountain Biking UK, and he has been editor of 220 Triathlon and Cycling Plus. Mat has been road.cc technical editor for over a decade, testing bikes, fettling the latest kit, and trying out the most up-to-the-minute clothing. He has won his category in Ironman UK 70.3 and finished on the podium in both marathons he has run. Mat is a Cambridge graduate who did a post-grad in magazine journalism, and he is a winner of the Cycling Media Award for Specialist Online Writer. Now over 50, he's riding road and gravel bikes most days for fun and fitness rather than training for competitions.

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22 comments.

I'm old enough to remember when 13 grand got you a bike that weighed less than 6kg, now it doesn't even get you near the legal minimum 

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Trek have never been the cheapest though have they?

Fastest bike ever? And I thought that it was the legs which propelled the bike. 

At least when it inevitably starts cracking around the seat cluster you won't have to be seen riding such a monstrosity while making the warranty claim

The problem with all these cutting edge bicycles is that every year they get replaced with an updated version which is so significantly improved in every marketable way to the extent that 5 year old models must become unmoveable, lumpen monstrosities with the handling characteristics and appeal of 3 day old fish by comparison.

Think how bad toothpaste must have been 50-60 years back...

And dog food.

I'll admit to nibbling on the odd Bonio dog treat when I were kid. Seem to recall they were no worse than the cat crunchy I accidentally ate a couple of weeks back when I thought I'd picked up the bag of peanuts.

I'm rather partial to these salami sticks for a nibble. Daughter asks why I'm eating cat treats!

They are great for tubeless punctures. 

Trek really does try too hard to be different. Fugly has never been a design philosophy that would get me to part with my money. 

I reckon the new Domane will be a better ride on real world roads. 

I don't now what's happened between the original story on this bike and now, but it's grown on me and I actually quite like it. I'd sill be nervous about the longevity of the seat... er, ledge with the weight of a rider who's not a five-foot, skinny pro over rough, bumpy roads - so I doubt this'll be my next bike.

These prices are crazy. £2300 extra to go from 105 Di2 to Ultegra Di2 with the rest of the spec staying the same?!

Ribble are charging £700 for the same upgrade.   

I think best bet would be to get the SLR6 and then upgrade the shifters later. Couple of hundred grams extra but you'd save yourself a fortune

These price points do seem questionable to put it politely. And would anyone serious pay £900 more to stick 200grams on your bike and less reliable performance in eTap over Dura Ace? 

I'm sure there are other spec differences, but on the face of it... hmmm.

and that's ignoring the near £14k asking price for the top of the range model... come on, when will people start questioning this stuff.

Personally, my next bike will be a quality open mould frame with some fancy dance paint on it. Mechanical campag grouspet (assuming Campag doesn't do a Shimano in the coming weeks), and probably some hunt wheels. 99% of the performance for a third of the price. 

I'm guessing the upgrade will also include the fancy bar/stem combo? Or better carbon etc etc

I quite like the bike...but too much £££ for me

Nope, identical spec bar the groupset. You could get the 105 Di2 SLR6 and upgrade the whole drivetrain to Ultegra Di2 for less than the SLR7

Ssco wrote: Nope, identical spec bar the groupset. You could get the 105 Di2 SLR6 and upgrade the whole drivetrain to Ultegra Di2 for less than the SLR7

Plus (or minus, depending on which way you look at it) you could eBay the 105 groupset for probably £1400, meaning the whole upgrade would cost you around £700. £2300 for an approximately £700 upgrade in groupset with no other differences is simply an outrage.

Yeah but Ribble will never be able to deliver your bike, whilst having had your cash for months/years.

2 bikes released today that both claim to be faster, lighter and comfier than the model they replace. 

The Scott I'd seriously consider if I were in the market for a fast sunday best bike (and my decrepit spine could allow me to ride it) but the Trek? No way. Apart from the fact that design is fugly I'd have serious concerns it could take my weight in the long term and the resale value of these will be through the floor.

I know we don't buy a bike thinking of selling it but it must be a consideration in this design.

4680 quid to save half a kilogram - Ultegra Di2 vs SRAM AXS Red and some slightly better wheels. This has got to be the piss take pricing of the year so far. 

I'm sure it's going to get a lot of hate because it doesn't look like something good 'ol Eddy rode but chapeau to Trek for shaking off the shackles and buidling a 21st Century bike.  Let's not forget it is intended to win World Tour races, is a pro machine and I doubt anyone ever stopped to consider the needs of a commuter or gravel rider whilst designing it.

Exactly, and it's grown on me a bit. Certainly better looking than the new Scott Foil. Trek pricing is up the spout though!

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Great stuff. Maybe you could contact FlightFreeUK and take a lifetime pledge as a company. I'm pretty sure the founder cycles too

Shimano for me please ! 👋👋

Looks more like it is designed to keep the bike thieves in rather than out. That might in fact be a better solution.

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• Rider Notes

2024 Trek Madone SLR 9 Gen 7

A carbon frame aero bike with ultra high-end components and hydraulic disc brakes. Compare the full range

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Madone SLR 9 Gen 7

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4'11" – 5'3"

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• 5'11", size 56cm, Fits small
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Nov 2023 · Mat Brett

It had its idiosyncrasies – including flip-out 'Vector Wings’ in the head tube – but we wish every new bike offered as many interesting features as the Trek Madone 9 Series did back in 2015

Read Review

Oct 2023 · James Huang

The same cutting-edge aerodynamic performance of Trek’s flagship Madone SLR, distilled into a much more affordable package.

Heaps lighter than before

Tangibly speedy

Surprisingly good ride quality

Superb handling

Lots of tire clearance

User-friendly two-piece cockpit

Sharp lines.

Polarizing IsoFlow aesthetics

Poor weathersealing

Narrow wheels and tires.

Trek's new Madone SL Gen 7 is set to deliver SLR performance at a (much) lower price point. So — is the Madone SLR worth the extra money?

Aug 2023 · Troy Templin

The Trek Madone SL Gen 7 now completes the line matching the more expensive SLR and offers almost the same ride quality.

May 2023 · Simon von Bromley

The seventh-generation Madone is an excellent all-round performer, but it comes with a big price tag

Composed yet fast

Innovative design

Front end can run both integrated and non-integrated handlebar setups

Wide range of frame sizes

No power meter

Mid-range tyres and cheap inner tubes don’t belong on this bike

Dec 2022 · Sam Challis

The new Madone is leaner, meaner and wickedly quick

Very fast ride feel

Smart componentry design

Light weight

Narrow bars take some getting used to

Vulnerable in gusty conditions

Dec 2022 · Ronan Mc Laughlin

The "ultimate race bike" has only a few minor flaws – and the hole in the seat tube isn't (exactly) one of them.

Seriously expensive, IsoFlow equals spray flow, fit can be tricky.

Dec 2022 · Julian Schwede

Does the new IsoFlow system of the 2023 Trek Madone SLR 9 eTap Gen 7 really rise the bar in terms of aeroynamics and comfort?

Very balanced handling at high speeds

Reduced complexity and improved aerodynamics of the IsoFlow system

Customisation options thanks to the Project One configurator

High-quality workmanship

The damping of the IsoFlow system isn’t adjustable

The Bontrager R4 tires lack grip

Last updated April 20