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Shop Trek Aero Seatpost Clamp Ears 7x10mm for Madone 9 Series – W524901

$ 10.60 $ 7.60

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Chainstay armor #W536434 e.g. for Trek Fuel EX/Remedy/Slash (2017) – versions with carbon chainstays.

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Trek Madone 4.9 2010 30.2mm Silver Seatpost Clamp

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Problems with the Madone 5.2 Pro seatpost

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Do you have the old seatmast or the redesigned one? Mine came with the first design, and I really wasn't happy with it. I had some slippage but didn't break a bolt or anything like that. Fortunately, I had asked for a redesigned one at the time of purchase and when it arrived, I switched (really needed a tall anyway instead of the standard length). Much better clamp now, I think, and I haven't had any problems at all since. If you have the older design, I'd go for a new one even if the broken bolt is somehow removable (I'd be interested in seeing a picture if you have one). At any rate, I would think this is something that's covered by the Bontrager warranty.  

The mast is not replaceable, its integrated into the frame as one piece. The seat cap is replaceable. My 5.2 came with the original clamp when I purchased it in Dec 07 and was upgraded to the new cap and clamp by Trek shortly thereafter at no expense to myself. I never experienced slippage with the original clamp and the same can be said of the replacement clamp.  

I certainly have the redesigned seatmast with the black clamp.  

08Madone5.2 said: The mast is not replaceable, its integrated into the frame as one piece. The seat cap is replaceable. . Click to expand...

I know this has been covered before, but for the sake of refreshment, can anyone explain how one can tell at a glance, whether the seatpost on a Madone is the old one or the revised one?  

the sky above said: I know this has been covered before, but for the sake of refreshment, can anyone explain how one can tell at a glance, whether the seatpost on a Madone is the old one or the revised one? Click to expand...

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Reports of the demise of this Web site are greatly exaggerated! We at sheldonbrown.com thank Harris Cyclery for its support over the years. Harris Cyclery has closed, but we keep going. Keep visiting the site for new and updated articles, and news about possible new affilations.

This page describes how to measure bicycle seat tubes and seatposts, and lists various bicycles, and the seatpost diameters that fit them.

Sheldon brown started compiling a list, and realizing that it was too large a project for one person, he solicited information from readers. john allen and harriet fell have received more reader-provided information but we will no longer update this file, except to correct errors. we recommend measuring, both because it is more reliable and because we can't possibly have information on every make and model of bicycle. so this article also describes how to take measurements, even if you don't have the "right" tools..

The size is usually stamped on the seatpost near the bottom. It will be near the minimum-insertion mark, not visible when the seatpost is installed on a bicycle.

On a related topic, we have an article (by Sheldon Brown, updated by John Allen) on Stuck Seatposts which may be of use to you.

National and Historical Trends

Most steel bicycle frames have tubing of standard outside diameter. Frames made to British or Italian standards will typically have 1 1/8" (28.6 mm) seat tubes . Older French bicycles used 28 mm. Old American style, commonly used on BMX bicycles and other bicycles that use one-piece-cranks , uses a 1" seat tube. Standard outside diameter accommodates standard lugs and clamp-on parts such as front derailers, pulleys and other cable guides, pump pegs, etc.

High-performance bicycles are made of thinner-walled tubing, so the hole will be larger if the outside diameter is kept the same.

As a result, a larger seatpost size is often a sign of a higher-quality bicycle. This has resulted in a de facto standard of 27.2mm for high-quality bicycles that have 1 1/8" O.D. seat tubes. Since high-quality seatposts are widely available in 27.2, most high-end aluminum and carbon-fiber road bicycles also use 27.2.

A recent trend to oversized tubing has resulted in the introduction of oversized seatposts (anything over 27.4 would be considered oversized.) These are more commonly seen on mountain bikes, where the longer seatposts can use the extra strength. Common diameters arey 30.9mm and 31.6mm.

Diameter is not the only factor affecting compatibility. Using a carbon-fiber seatpost in a metal frame, or vice versa, invites problems. Metal should be greased, but carbon fiber should not be. The seatpost clamps of metal frames easily damage carbon-fiber seatposts.

Most of the size information on the list below was provided by people like you. We have no way to check the accuracy of the data. It should be noted that frames can be reamed out to take a larger-sized seatpost, and sometimes a replacement seatpost may be a slightly different size than the original.

Measuring is better than guessing. Most better bicycle shops will have a set of seatpost-sizing rods like this:

Alternately, you could check the diameter of a seatpost that fits. The diameter is stamped on many seatposts (usually on the part that is fits inside the bicycle's seat tube and gets scratched up and covered with grease, *sigh*). You also could measure the diameter of the seatpost and of the hole in the seat tube using a dial indicator or vernier caliper.

Dial indicator caliper

Vernier caliper

You don't even need a caliper to compare seatposts. A large adjustable wrench, set to just slip over a seatpost, is fine that purpose. -- see our article about trick measurement techniques .

Sheldon collected seatpost-size dimensions to place in the table below. I (John Allen) rpeat: I have dropped this task, for two reasons: it is tiresome, and measuring is far more reliable. As the saying goes, a comparison is better than a measurement. But also, a measurement is better than looking up a measurement of a different seatpost or seat tube. There is no guaranteee that it will be correct just because the bicycle make and model match those in the table. Compare, or measure!

That said, here are links to the measuurements we have.

Continued at https://www.sheldonbrown.com/seatpost-sizes-m-z.html...

Sheldon was previously listing people who had contributed data points to this list, but doing so more than doubles the time it takes to enter data, so he stopped doing it, and we hope everybody will forgive us for discontinuing this..

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NCM Milano Electric Bike Review

When you purchase through links on our website, we may earn a commission. Affiliate disclosure.

NCM make high-quality, but affordable electric bikes, in this review I will explain why I believe the NCM Milano is the best electric commuter bike for the money.

About NCM Electric bikes

NCM electric bikes are owned by Leon Cycle GmbH a German company based in Hanover. Their e-bikes are designed in Germany and manufactured in China.

Specification

The centrepiece of this Electric bike is the X15 geared rear hub motor: This reliable 250W rear electric motor is known for its durability and high torque output, enabling the rider to maintain 15.5mph for long periods. There is no compromise in handling with the small motor centred in the rear hub.

48v13ah Lithium battery pack with USB charging port for mobile devices: Bulky battery packs take up a considerable amount of space, but the Milano’s battery is integrated into the down tube of the bike, keeping the weight low and central, which helps to improve stability. The manufacturers claimed a maximum range of 75 miles seems a little optimistic. The total battery energy capacity is 624wh (watt hours), so if you were consuming 20wh per mile, your range would be 31 miles. My friend owns one of these bikes and gets an average range of around 40-50 miles.

This bike is built for comfort:  The Schwalbe touring tyres, Suntour front suspension, adjustable handlebar stem, Selle Royal ergonomic grips and saddle with suspension post all make for an incredibly comfortable ride, even over longer distances. The Shimano 7-Speed gears, index perfectly – shifting is crisp and precise.

Fully functional control panel display: The Das-Kit LCD gives you all the information you would expect from an e-bike display. including journey time and mileage. It also has 6 power levels of pedal assist, so you can fine-tune the power output to suit your ride.

Excellent build quality: The NCM Milano is designed to look great but with no compromise on functionality and safety. The Tektro mechanical disc brakes with 160mm rotors provide adequate braking and the brake levers incorporate motor cut-off switches to ensure safe riding. The front and rear lights work off the battery and provide an extra level of safety – especially when riding in the winter. Internal cable routing finishes off the package neatly and not only looks great but protects the cables from the elements.

In my opinion, the NCM Milano electric bike offers exceptional value for money. It is unusual to see such a high-quality, well-made e-bike at this price point. What’s more the specification is excellent. The 48v13ah battery will certainly provide users with a realistic range of between 30-45 miles, or 31 miles using the 20wh per mile calculation. The claimed range of 75 miles may be a little optimistic for everyday use – it depends on how much you use the electric assist.

Tektro Mechanical disc brakes should provide adequate stopping power, while the Schwalbe tyres will provide a reasonable amount of puncture protection.

The attention to detail on this bike is great. The internally routed cables and the integrated battery pack make for a very clean finish, something you only usually find on more expensive e-bikes.

The fact that this bike has mudguards, a pannier rack, lights and a kickstand fitted, means that it is excellent for the daily commute in all weathers, or perfect for some weekend touring. The inclusion of a gel saddle and suspension seat post make this bike a truly comfortable and versatile all-rounder.

If you are in the market for an incredibly versatile and affordable e-bike this definitely ticks all the right boxes

A friend of mine purchased one of these back in the Summer and he was kind enough to let me take it for a spin. I can honestly say it was a revelation! The gel saddle was incredibly comfortable and the small X15 hub motor was quiet and smooth. It produced a lot of power for such a small motor, making climbing the steep Cornish hills a doddle! The brakes and front suspension were more than adequate for the back lanes of Cornwall.

I really cannot recommend this bike enough. It has to be one of the best value e-bikes on the market at the moment, and the specification is great.

The great thing about this e-bike is that it is a true hybrid – it is equally comfortable being ridden on tarmac or unpaved surfaces. It can even be used for some light off-road riding.

If you are in the market for an incredibly versatile and affordable e-bike this ticks all the right boxes.

Incidentally, NCM’s other 48v 250w bike is called the NCM Moscow , I will be reviewing this bike shortly. I have personally worked on and ridden a Moscow, and it is on par with the Milano for the ride and builds quality. It uses identical electric components but in a mountain bike-style frame.

Meet Tony, a passionate e-bike advocate and enthusiast who discovered the life-changing benefits of electric bikes back in 2016. Tony’s technical experience within the e-bike field was gained while running a successful electric bike conversion business for 5 years in his home county of Cornwall, UK.

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46 Comments

boa taarde tenho uma biçicleta destas mas necessito de assistencia em Portugal. ela não arranca e não encontro uma ofecina que repare esta marca e com a garantia

Hi! Thank you for the review! I bought Milano a week ago, so far so good. I found the first assist speed to be stronger that I’d like it to be. Is there any way to rebalance those 1-6 modes within the given range, so it starts not as strong?

Don’t know if this is still open, but I really like the Milano plus, my only question, is how easy is it to remove the battery beneath that tube? Can it be done one handed? Cornwall my home!

Turning the key releases the battery catch, then you need to lift it slightly, move it forward and remove. I would imagine it’s possible to do it one handed, but it would be fairly tricky as the battery weighs around 3kg.

Let me know if you have any more questions.

Regards, Tony

bike seems well make and sturdy but i find the tyres are so skinny that when you are on slightly uneven surfaces even at a slow pace & i’m talking in number 1 setting it is dangerous and you could so easy fall off on a slightly uneven footpath. It’s ok on even ground but i wouldn’t let my wife ride it. I’ll try putting new tyres on it & see how it goes or it will be sold. In comparison i have another basic ebike in the states which is so stable this is nowhere close to and ride all types of tracks on it which is also a similar style. i would say I’m disappointed in it so far & feel its an accident waiting to happen.

Bonjour J’ai juste une question ,je mesure que 5 pieds !!!! Donc le small peut-il me convenir

Bonjour, Je pense que même la version 26″ est peut-être un peu trop grande. NCM recommande une hauteur minimale de 5′ 2″ de 160 cm.

Excellent review Tony,

I went ahead and bought the Milano and I’ve been very impressed with it so far. I was wondering if you’d know whether the 48v 16ah battery for NCM bikes would be compatible with the Milano model? I can’t seem to find a 48v 13ah battery anywhere.

Many thanks, Andy

An NCM Milano Plus battery should fit straight in. The 16Ah battery is the same size and uses lithium cells with a higher energy density.

Bonjour Je viens d’acheter ce vélo Mais je me pose la question, comment mettre en route la lumière avant ? Merci de votre aide

Appuyez et maintenez la touche « + » sur l’écran pour allumer le phare.

Bonjour Tony, Merci pour votre commentaire très instructif. Je souhaite acheter le Milano car après avoir étudier le marché des vélo électriques; il semble être d un excellent qualité-prix. J ai expérimenté le Veligo. Il me semble etre un peu similaire. Mais j ai une petite hésitation…si vous pouviez m éclairer…a t on sur le vélo le dos droit? Je pensais le prendre en taille L (28 pouces)(Je fais 1,74m) pour avoir une assise plus confortable. Je l utiliserai quotidiennement pour aller travailler. Pensez-vous que c est un bon choix? Ou devrais je m orienter vers un vélo de ville type Elops de Decathlon ou Sydney de Ubanbiker?(que je trouve tout de même assez cher) Merci pour votre réponse. A très bientôt, Linda

Bonjour, La taille fait référence au diamètre de la roue (28″). Tous les cadres NCM Milano sont identiques et correspondent à une taille moyenne. Cela devrait être parfait pour votre taille. La potence du guidon est également réglable, ce qui vous permet de monter le guidon encore plus haut si nécessaire. Salutations, Tony

I am seeing two different Milano Max models…N8C and N8R. They look exactly the same and with the same specifications. What is the difference?

I checked online for milano and price was 1189 Canadian dollar. On Monday I decided to buy it but unfortunately price went up to 1359$. I’m surprised as during holiday season everywhere else reducing their prices but your price was raised.

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