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Trek Marlin 4 Gen 2 Review: A Capable Budget-Friendly XC MTB

Trek Marlin 4 is the second cheapest model in Trek’s mountain bike range, at just $630. 

This stylish, modern-looking hardtail is a solid introductory bike for day-to-day riding, commuting, and leisurely weekend spins on gravel and dirt trails. 

Although it looks the part, the Marlin 4 can’t handle actual mountain trails, as the low-performance fork won’t take much abuse. 

This Trek Marlin 4 review will provide a detailed look at the bike, its strengths and weaknesses, and the type of rider who should buy it. 

What Is the Weight Limit on a Trek Marlin 4?

The weight limit on a Marlin 4 MTB is 300 lbs, which includes the bicycle, rider, and cargo. The bike weighs just under 32 lbs, leaving around 268 lbs for the rider and cargo. 

• Sleek design with internal cable routing
• Shimano drivetrain
• Cheap 
• Heavy, low-performance fork

Trek Marlin 4 2023 Full Specs

Trek marlin 4 gen 2 full review.

The Trek Marlin 4 2022 is the same as the 2023 model. It has a basic 3×7-speed Shimano Altus/Tourney groupset and Tektro mechanical disc brakes, a typical pairing for the price range. The SR Suntour XCE 28 isn’t worth much on mountain trails but takes the sting out of bumpy gravel trails and roads. 

This section will cover the features and components that make the bike stand out in its price category. 

Is the Trek Marlin 4 a Trail Bike?

The Trek Marlin 4 is not a trail bike. Trail mountain bikes typically have above 120mm of travel, and the majority of models are full-suspension. Instead, the Marlin 4 is a light-duty off-roader better suited to urban riding and gravel trails.

If you want a proper trial bike, check our list of the best full-suspension mountain bikes out there.

Stylish Alpha Silver Aluminum Frame

The whole Trek Marlin series uses the same Alpha Silver aluminum frame. However, at less than half the price of the premium model, this frame is a notable strength of the Marlin 4. 

Marlin 4 has full internal cable routing, which is a popular feature that not all mountain bikes in this price range offer.

Trek’s Alpha Silver frame comes from years of materials innovations and design expertise, resulting in a balanced ride quality that balances stiffness and compliance compared to the overly stiff aluminum frames typical of this price range. 

This frame also has sleek internal cable routing that gives the bike a higher-priced finish and mounts for a rack and kickstand for commuting or even light bikepacking. 

What Is the Difference Between Trek Marlin 4 and 5?

There isn’t a big difference between the performance of the Trek Marlin 4 vs. 5. The Marlin 5 has a slightly more robust fork, improved 2×8-speed gearing and hydraulic disc brakes, and a slightly lower weight. However, the Trek Marlin 4’s price is $110 lower than the Marlin 5 . 

Progressive Sizing

The Trek Marlin 4 2023 comes in seven different sizes, with almost two feet in between the shortest and tallest recommended heights. The company uses progressively sized wheels and components and a modified top tube for the smaller bikes to deliver the same performance for each rider . 

The XS and Small sizes both have a curved top tube which lowers the standover height, which shorter riders have issues with, and ‘Smart Wheel Sizes’ means the smaller sizes get 27.5″ wheels instead of 29ers. In addition, the brake levers, handlebars, stems, and cranks all change throughout the size range. 

Reliable Bontrager Componentry 

Trek Bikes’ in-house brand Bontrager provides the whole build kit aside from the groupset and fork. These are well-made components that will stand the test of time. In addition, they are easy to replace by visiting the Trek online store. 

Premium all-black finish and quality Bontrager parts help Trek Marlin 4 look good and provide better value for the money.

It’s worth noting that the saddle, handlebars, seatpost, and stem are the same across the five Marlin bikes, which benefits the Marlin 4 and increases its value as it is the cheapest. 

Trek Marlin 4 Gen 2 Sizing Chart

• XS — 4’9″-5’1″ / 145-155cm
• S —  5’1″-5’5″ / 155-165cm
• M —  5’5″-5’8″ / 165-173cm
• M/L — 5’8″-5’11” / 173-180cm
• L —  5’11”-6’2″ / 180-188cm
• XL —  6’2″-6’5″ / 188-195cm
• 2XL — 6’5″-6’8″ / 195-203cm

Who Is Trek Marlin 4 Gen 2 Best Suited For?

The Trek Marlin 4 mountain bike is suitable for urban riders, commuters, and anyone who enjoys riding on light off-road paths, fire roads, and gravel trails. 

By equipping Trek Marlin 4 with a rear rack and kickstand, you can use it for commuting, running errands, or even bikepacking.

The level of components is typical for this price point, and they perform as expected. However, there are clear limitations to this bike’s capabilities off-road. So if you’re looking for a capable XC mountain bike, this isn’t it. 

Anyone looking for a cheap, reliable run around that doesn’t sacrifice style will appreciate the Trek’s Marlin 4. 

Other Trek Marlin Bikes We Reviewed:

• Trek Marlin 5 Gen 2 Review
• Trek Marlin 6 Gen 2 Review
• Trek Marlin 7 Gen 2 Review
• Trek Marlin 8 Gen 2 Review

Is Marlin 4 Gen 2 a Good Buy?

We believe the Trek Marlin 4 Gen 2 is an excellent buy in the ~$600 price range, easily competing with similarly-priced hardtails like the Cannondale Trail 8 or Co-op Cycles DRT 1.0. 

Trek bikes are renowned for their reliability, and with the Marlin 4, you’re getting this reliability at an unbeatable price. And if that wasn’t enough, it’s got a sleek modern design that makes it look more expensive than it is. 

Consider the Marlin 4 if you want a Trek mountain bike that doesn’t break the bank and will get you from A to B in comfort and style.  

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Trek Marlin 4 Gen 2

Marlin 4 is the perfect gateway to trail riding. It's ideal for new riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, 21 speeds, and mounts for a rack and fenders make this a great bike for new trail riders and campus commuters alike. It's right for you if... You want an introductory mountain bike at an incredible price but also want a commuter that's rugged enough to hop curbs on the way to class. The tech you get A lightweight aluminum frame with internal routing to protect your cables and add to the bike's sleek look, 21 speeds, a wide range of gearing so you always have the right gear for your terrain, powerful mechanical disc brakes, and a suspension fork that takes the edge off bumps and rough terrain. The final word Marlin is made for any adventure. The rack and fender mounts make it a great choice for commuters who want to get a little rad on the way to class or the grocery store. Why you'll love it - It's a real mountain bike that's also perfectly suited to daily commutes, rides around campus, or just getting from A to B on any surface - Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter - Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently - Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount - Like every model in the Marlin family, it's backed by Trek's lifetime warranty Wheel size: - Sizes X-Small – Small: 27.5-inch - Sizes Medium – XX-Large: 29-inch

Will my bike have a curved top tube?

Smaller frames (XXS-S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. The larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

Due to supply-chain issues, Specs are subject to change without notice.

* Subject to change without notice.

Part Numbers

The Trek Marlin 4 Review That You’ll Love

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Mountain biking or even simple daily commutes can be a thought, especially if you don’t have the right bike for this type of terrain. The Trek Marlin 4 is a premium quality bike that was designed to deliver superior performance and responsiveness for the efficient daily rider in varied terrain locations and environments. The design of this amazing bike is very efficient thanks to the lightweight aluminum that the frame is crafted from.

This rugged commuter and real mountain bike provide excellent handling capabilities under virtually all conditions so you can be confident that it will withstand any brutal trails thrown it’s way making it a great experience . A unique design feature about this particular model is that it has what is known as progressive geometry, which gives you added control over your bike .

In addition, the mountain bike comes with an extensive set of different features and design implementations that bring its true power and versatility to the forefront. From the frame to the wheels, everything about this bike screams optimized performance. If you’ve been wanting to try a premium quality trail bike but haven’t had the money to do so, this is a great opportunity for you to get an exceptional bike for an incredible price .

The versatile design of this amazing bike contributes to its overall build quality and real-world performance capabilities, which you’ll experience when you dig into the pedals. You’ll also find entry-level premium quality Shimano parts on this bike that consistently deliver precise handling, feel, and adaptability for daily commutes and the hardest trails. Another powerful feature on the Marlin 4 is it’s 21-speed Shimano branded drivetrain that provides extreme power assistance with every pedal.

If you’re interested in the Trek Marlin 4 but need to know more information before making your purchase decision, you’ve come to the right place. To begin, let’s take a look at exactly who the Marling 4 was designed for and how you can benefit from this particular trail bike , even if you are just a commuter who loves using biking to get to the supermarket, go to a perfect gateway or if you are one of those campus commuters who like to ride to campus instead of other transport.

Marlin 4 is the perfect gateway to trail riding. It's ideal for new riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, 21 speeds, and mounts for a rack and fenders make this a great bike for new trail riders and campus commuters alike.

Who is the Trek Marlin 4 for? 

Fully-capable yet simple to use bike . It comes as a 21-speed, meeting the needs of every environment you come in contact with. This trail bike uses some of the same technology found in higher end mountain bikes made by the same company, all of this combined with an Alpha Aluminum frame that is lightweight and very durable.

Even though it’s for new trail riders , you can find advanced features such as knobby tires , disc brakes , and more, which create a very reliable trail bike that you can depend on. For those that want an affordable quality bike , that will allow them to tackle simple trails as well as rough terrain, this is a great experience and choice.

Now, we’re going to take a close look into all of the various pros and cons one can expect to encounter when using the Trek Marlin 4 for their biking adventures.

Pros & Cons

This is an all-around high-performance trail introductory mountain bike packing many advanced features and capabilities you will enjoy regardless of your riding style or experience.

Prior to purchasing yours, you need to know about all of the various pros and cons so that you can make an educated purchase decision about whether or not this is the right choice for you. Below, we’re going to provide you with a detailed look into the various pros and cons of the Trek Marlin 4, so you will have a solid idea of what to expect when you buy it. 

• SR Suntour XCE 28 100mm fork that delivers stable ride performance and handling throughout various terrains
• Frame made from lightweight Alpha Silver Aluminum which is very durable
• 21-gear shifter gives you the ability to easily adjust the power of your ride on the fly
• Double-wall Bontrager Connection rims
• Tektro mechanical disc brake w/ 160/160mm rotor
• 27.5”/29” x 2.20” in. tires
• Shimano Tourney TY300 7-speed 3-speed Front and Read Derailleur
• Trek’s lifetime warranty applies to all the frames including their first frames made in 1976
• Limited customization options in terms of configuring the fit and comfort level of the bike
• The fork does not have a lockout feature

All of these are these pros and cons that can either hinder or aid your riding ability depending on the specific terrain and environment you’re in. It’s important to consider these different pros and cons so that you will be able to make an educated decision about whether this is the right bike for you. 

Now, let’s take a look at some of the core features you can expect to encounter when using the Trek Marlin 4. 

Characteristics

The Trek Marlin 4 is packed with a lot of different features that come together to deliver easy riding that works well for virtually any beginner or experienced riding enthusiast. By becoming educated about all of the features, you’ll gain access to when using it as your designated bike. Below, we’re going to give you a detailed breakdown of all the core features that the Marlin 4 has, so continue reading. 

Frame 

The Marlin 4 model is made from an alpha aluminum frame that is very durable and lightweight. This adds an enhanced level of control over the bike so that you can take on different terrains at your own pace. The frame also uses a unique design integration known as progressive geometry, which embeds natural adaptability and versatility to the bike overall. The frame also has an integrated SR Suntour fork, which reinforces ride stability and precision.  

The fork has 100mm of travel, which is more than suitable for the riding style this bike was designed for. One of the negative features of this bike is that it does not come with a lockout feature, so you can’t lock it while riding on paver road. In addition, this mountain bike comes in seven different frame sizes: XS, S, M, M/L, L, XL, and 2XL. 

Shimano Integration 

One of the best features of the Trek Marlin 4 is that it has Shimano branded parts that come as a standard option. These components are entry-level Shimano Tourney components that deliver 21 gears on a 3 x 7 configured drivetrain. The cassette on this bike also has a 14 x 28 tooth range which is not optimal for very steep hills, but it can still work. 

Brakes 

The Trek Marlin 4 comes with Tektro mechanical disc brakes that deliver accurate stopping power on the drop of a dime. These brakes enhance the overall capabilities and ride performance of the bike; overall, they come outfitted with 160mm rotors on both wheels, and they are trail-ready right out of the box. If you come across some very big drops or have to quickly hit the brakes, these will do the job effortlessly. 

Tires & Wheels 

The Marlin 4 comes outfitted with Bontrager tires and wheels that are very durable and long-lasting. These tires will allow you to tackle tough terrains and environments with little effort. The Marlin 4 comes in seven distinct sizes, and the smaller ones are outfitted with 27.5″ in wheels while the other models utilize 29″ in wheels. 

Aesthetic 

The Trek Marlin 4 has a very optimized and modernized look that appeals to both new riders and experienced ones. Considering its price, this bike has a stunning look that will leave you absolutely mesmerized when riding it. 

All of these different features combine to create a very powerful trail bike that is affordable yet very capable. Consider what key features and design elements you’re looking for in an introductory mountain bike so that you will be able to make a decision about whether or not this is the right option for you. Everyone has a different riding style and depending on yours, all of these various features can aid you in achieving the type of ride you want on virtually any terrain. 

If for some reason, the features we mentioned above don’t seem to apply to your specific situation, the good news is that we have a lot of alternative recommendations for you to choose from. Continue reading to find our list of some of the top alternative recommendations to the Trek Marlin 4 if it just doesn’t seem to be what you need. 

Alternative Recommendations 

#1 raleigh bicycles tokul.

The Raleig h Bicycles Tokul builds on top of the Tokul 3 frame design, which is a hardtail that is attached to a rugged aluminum frame that is longer and much more relaxed than previous bike models. The tires on this bike are Maxxis Minion DHF/DHR 27.5×2.8 variants placed on top of a 50mm wide rim that delivers more precise handling on all terrains.

You’ll also find that the drivetrain on this bike is an SRAM NX 1×11, and it has front/rear thru-axels and a RockShox Judy Silver Solo Air fork supports the ride mechanics of the bike very nicely. The fork has about 130mm of travel, and it is backed by Shimano MT200 hydraulic disc brakes that provide smooth modulation when the bike is entering corners. 

All of these various features combine to create a powerful and capable bike that can take on many terrains and features.

The Raleigh Bicycles Tokul has various features combine to create a powerful and capable bike that can take on many terrains and features. 

#2 Schwinn Bonafide Mountain Bike

The Schwinn Bonafide Mountain Bike comes with an aluminum mountain frame in addition to a very powerful Schwinn suspension fork that is capable of taking on a lot of direct impact without transferring the shock to the rider.

The overall setup and mechanics of this bike provide a durable riding experience that is backed by a 24-speed Shimano EZ fire trigger shifter that sits atop front/rear derailleurs making gear changes seamless.

This bike also comes equipped with front/rear mechanical disc brakes that deliver precise and clean stopping power under a wide range of different variables. You’ll also find Schwinn alloy cranks on this bike that add solid gearing action and reduces the overall maintenance required for the bike. 

High-profile double-wall alloy rims are also included on this bike, and they add tons of durability to the overall ride experience even when taking on bumpy terrains. The bike comes from the factory ready to be assembled, and it includes a standard 5-year warranty that protects the wheels and other parts in the event of a crash or damage.

With an aluminum mountain frame in addition to a VERY powerful Schwinn suspension fork, the Schwinn Bonafide Mountain Bike provides a durable riding experience without transferring the shock to the rider.

#3 Redline Bikes Monocog 29-Speed Mountain Bike

The Redline Bikes Monocog 29-Speed Mountain Bike has a full-chrome steel frame and fork combination that lasts an extremely long time. Tektro mechanical disc brakes are on this bike to deliver immense stopping power under nearly any possible conditions.

The wheels on this bike ae 29in. Alloy aluminum that allows you to tackle rough terrains without having to stop or worry about your bike being damaged during the process. Pedals are included in the package with this bike, and it has a vee rail 29×2.25in. The tire that has awesome gripping capabilities in gravel and paved roads. 

This is a great choice if you’re looking for a reliable trail bike that comes packed with tons of great features and versatile specifications. 

The Redline Bikes Monocog 29-Speed Mountain Bike is a GREAT choice if you're looking for a reliable trail bike that comes packed with tons of great features and versatile specifications. 

FAQs About Trek Marlin 4

The Trek Marlin 4 is the optimal beginner bike for those who want to get into the sport or hobby of all-terrain and trail riding. Every component on this bike is premium quality from the suspension system to the brakes and even the gear shifter, and the frame makes it great both on and off-road.

Yes, in the world of trail riding Trek is known as one of the leading bike manufacturing companies. On Trek’s official website, their slogan is “The world’s best bikes” which should tell you something.

Yes, when you consider the features and design specifications that come with all of the Trek bikes, they are well worth the money and are good investments.

Our Honest Opinion 

After looking at all of the core features and design specifications of the Trek Marlin 4, it’s time to give you our honest opinion. If you’re looking for an affordable trail bike that is powerful yet not too complicated to set up, the Marlin 4 is the perfect fit for you.

With entry-level Shimano parts and components that come as a standard feature on this bike, you can expect to get a lot of enhanced performance benefits even on simple rides.

It’s pretty affordable price doesn’t mean much in relation to the quality of this bike as it looks and feels like a premium selection. Its 21-speed gear shifter gives you the ability to easily transition to the optimal gear so that you can easily adapt to your environment.

In terms of its customization, the bike comes in seven different sizes; however, the larger bikes do not provide any specific benefits when compared to the smaller sizes. All in all, this is a great bike that is well worth the money you’ll spend on it, considering it’s primarily meant for beginners. 

Recommended Reads:

• Trek Marlin 6 Review [2020]: Is This Bike Worth Buying?
• Trek Marlin 5 Review [May 2020]: Worth the Money?

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• Crosscountry
• Rider Notes

2018 Trek Marlin 4

A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with mid-range components and mechanical disc brakes. Compare the full range

Manufacturer Price

For This Bike

View more similar bikes →

Based on frame geometry and build specs.

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Similar Bikes

(descending)

Add custom gearing

This cheap mountain bike is the perfect gateway drug to your next (trail riding) addiction.

Wide range of gears with 2x9 drivetrain

Wheels and tires aren’t tubeless-ready

Read Review

Jun 2019 · Alan Muldoon

The first of two 29er to make it into the sub 500 category, the Trek Marlin 6 certainly didn't behave like a fish out of water.

Top-rate frame quality, available in seven sizes Independent Shimano shifters

Cable and chain rattle. Rear tyre is too skinny

Dec 2015 · Guy Kesteven

Violently uncontrolled fork and blunt frame lead a list of reasons that Trek’s Marlin is best kept away from real off roading. Buy if you're a glutton for punishment looking to get into mountain biking

Size-specific wheels, range of paint jobs available

Punishingly stiff frame and handlebars, undamped fork, some poor finishing kit

Last updated February 15 Not listed for 2,277 days

2023 Trek Marlin 4 Review

Are you in the market for an entry-level mountain bike? Look no further; the 2023 Trek Marlin 4 is a great all-around trail bike designed for those on a budget.

The Trek Marlin 4 is one of many offerings from the bike manufacturer Trek. 

With an option of 27.5 or 29 inche wheels, 100mm of smooth suspension, durable components and modern frame geometry, the Marlin 4 is a great choice for those looking to get into mountain biking or ride some light trails without breaking the bank.

If you’re looking for an affordable mountain bike that can do it all, then look no further than the 2023 Trek Marlin 4. 

In this review, we’ll breakdown how this bike performs and discuss its pros, cons and upgrades that come with it.

The Trek Marlin 4 is one of the best models currently available, offering great value at an affordable price point. 

Let’s take a closer look at what this bike has to offer and why it’s such a popular choice among cyclists.

The Marlin 4 is designed with a lightweight Alpha Silver aluminum frame and reliable performance components. 

With its 100mm front suspension your ride is sure to be as smooth as possible no matter what terrain you encounter on your journey. 

On top of this, the Shimano Tourney drivetrain gives you 21 speeds to choose from, so you can always find the perfect gear for any situation.

For suspension, the Marin 4 features an SR Suntour XCE 28x fork with remote lockout for maximum efficiency on any terrain. 

This paired with Bontrager XR2 Comp tires makes for a mountain bike that can handle just about anything you can throw its way.

In terms of overall comfort, the Marlin 4 also comes kitted out with ergonomic saddle and handlebar grips for optimal rider support during long rides. 

Additionally, Formula DC alloy lightweight hubs make sure there’s nothing standing between cyclists and trails they explore. 

All in all these components work together to create a lightening-fast experience when it comes to hill climbs or tight turns while maintaining exceptional stability too!

– Modern mountain bike styling with aluminum frame, alloy crank arms, and adjustable 100mm travel SR Suntour XCE suspension fork

– 27.5″ or 29″ wheels for enhanced navigating capabilities on all kinds of trails

– Shimano 3×7 drivetrain allowing smooth shifting and wide gear range

– Mechanical disk brakes system offering steady braking performance in all weather conditions

– Bontrager Connection Tubeless Ready Rims allows tire’s lower pressure for grip at all times

Overall, the Trek Marlin 4 offers an unbeatable combination of speed and comfort at an affordable price point. 

No matter if you’re after greater control when tackling technical descents or just looking for something reliable following miles into a ride – this mountain bike provides it all!

Order online and have it shipped to your local dealer for final assembly!!

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• Marlin 4 Gen 2

Trek Marlin 4 Gen 2

Marlin 4 is the perfect gateway to trail riding. It's ideal for new riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, 21 speeds, and mounts for a rack and fenders make this a great bike for new trail riders and campus commuters alike. It's right for you if... You want an introductory mountain bike at an incredible price but also want a commuter that's rugged enough to hop curbs on the way to class. The tech you get A lightweight aluminum frame with internal routing to protect your cables and add to the bike's sleek look, 21 speeds, a wide range of gearing so you always have the right gear for your terrain, powerful mechanical disc brakes, and a suspension fork that takes the edge off bumps and rough terrain. The final word Marlin is made for any adventure. The rack and fender mounts make it a great choice for commuters who want to get a little rad on the way to class or the grocery store. Why you'll love it - It's a real mountain bike that's also perfectly suited to daily commutes, rides around campus, or just getting from A to B on any surface - Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter - Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently - Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount - Like every model in the Marlin family, it's backed by Trek's lifetime warranty Wheel size: - Sizes X-Small – Small: 27.5-inch - Sizes Medium – XX-Large: 29-inch

Will my bike have a curved top tube?

Smaller frames (XXS-S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. The larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

Due to supply-chain issues, Specs are subject to change without notice.

* Subject to change without notice.

Part Numbers

Trek Marlin 4 Review (Is It A Good Bike?)

Bikes , MTB , Other

Updated: March 17, 2022

Disclosure: I may receive referral fees from purchases made through links on BicycleVolt. As an Amazon Associate, I earn from qualifying purchases.

Trying to decide whether to buy the Trek Marlin 4? Then you’ve come to the right place.

Buying a new bike is never easy. So I’ve got a ton of detailed info in this review to make the whole decision making process a little easier for you – basically I’ve got everything you need in this article to enable you to go, “Yep, this is the right bike for me”, or “Nope, gotta move along to the next one on the list”. Firstly, I’ve got a full spec list for the Marlin 4, listing every component, so that you can compare the bike against others. Either other bikes from the Marlin range ( like the Trek Marlin 5 or the 6 ) or maybe even a different type of bike, such as the FX or Dual Sport ranges from Trek . I’ll then take you an in-depth write-up of the Marlin range, and the Marlin 4 in particular, so you can see what I think of this bike.

But, maybe you don’t have time for all that detail? Maybe you just want to know whether it’s a good bike, so you can either buy it or move on. Hey, I’m not going to be offended! Life is short and we’ve got bike rides to go on after all. So, here’s a quick spoiler. If you want a great entry-level mountain bike for light-duty trails, that’s also a great all-rounder and perfect for trips to the beach/grocery store or commuting to the office. AND you want all that at a stunningly-low price. Then the Marlin 4 is a great choice. If you want all that in a bike that’s a little lighter, a little more trail-ready, and you’ve got some extra coinage in your back pocket, then I’d suggest pushing the boat out slightly further and getting the Marlin 6.

Whichever Trek Marlin you choose, however, you’ll be riding around on it with a big grin on your face.

Now, spoiler over, if you’re able to stick around for a little longer we’ll go into a deep dive on the Marlin 4. Prepare to drool.

Trek Marlin overview

Trek’s Marlin range of bikes are known as mountain bikes, MTBs (for those looking for something that’s a little less of a mouthful) or “hardtails” (for those looking to appear a little more intelligent). For the rest of us, it’s useful to know that hardtails are bikes that have suspension on the front forks, dampening the trail vibration before it reaches your hands, wrists and arms. Full-suspension or ‘full-sus’ bikes are mountain bikes that have suspension on both the front and rear forks. Unless you’re an intermediate to advanced mountain biker then I’d recommend steering clear of full-suspension bikes. Top-of-the-range full-sus bikes are fantastic to ride but they come with a hefty price tag. Full suspension bikes that are more affordable tend to have rear suspension that is lower quality (therefore more prone to failure) and heavier (so you’ll have a harder time pedaling up hills).

Hardtails, like the Marlin range, are a great all-rounder. They’re sufficiently rugged to get around most beginner-to-intermediate bike trails with ease (and a grin on the rider’s face) and they’ll also take you to places where full-suspension MTBs would be completely out of place: the beach, the grocery store, the park at the weekend, and the office during the week. And that makes them a really versatile option for many people.

Trek’s Marlin range encompasses seven different models. These go from the entry-level Marlin 4 through consecutive numbers to the top-of-the-range Marlin 8. With these male/unisex bikes being complemented by the female-specific, Marlin 5 Women’s and Marlin 6 Women’s.

When I was researching the Marlin range online, I came across one comment which really summed it up: “Bang for the buck!!!!” Clearer the owner of this Trek bike was very enthusiastic about his purchase, though I did feel that the fourth exclamation mark was a little over-the-top. But, whatever, all the Marlin models are great bikes.

And, not only are they great bikes, by they’re also fantastic value-for-money. From the Marlin 4 at a touch over $500 to the Marlin 8, which is only around $1200. I say ‘only’ because, in the world of mountain bikes this is an absolute bargain.

So, the Marlin range is a series of hardtail mountain bikes, with great specifications, at a range of price points, that all represent excellent value. Let’s dive in and take a closer look at the Trek Marlin 4.

Trek Marlin 4 review

Pros: Lowest price in the Trek Marlin range; great ‘bang for your buck!!!!’ Cons: non-locking front suspension fork, narrower range of gears, heavier than other Marlins

Let’s start with looking at who this bike is for.

The Marlin 4 is a great all-rounder. It will take you on to plenty of backcountry trails, where you can have as much fun as you want on bike trails with loose stony or muddy surfaces. Returning home with a muddy grin on your face. Give it a clean down afterwards, pull on your work clothes, and it will take you to the office, with another grin plastered on your face (though, hopefully, less mud). In between, it will give you a lift to the beach, the grocery store, and around the local park to chase your kids.

If you’re new to cycling, then you’ll be hard pushed to find a better option than the Marlin 4, however you might not appreciate how versatile it is. Compare it to a road bike – the kind that you see spandex-clad speed merchants hunched over – or a full-suspension mountain bike and you’ll soon notice the differences. The Marlin 4 has a much more relaxed and upright riding position than a road bike does. Sure, you’re unlikely to go as fast as on a road bike, but you’ll ride in considerably more comfort. And you won’t be hitting the ‘Double Black Diamond’ bike trails on a Marlin 4, but then you might also have fewer trips to the Emergency Ward at your local hospital. Swings and roundabouts.

If you fit this description – you’re looking for an all-rounder bike and aren’t looking to achieve land speed records in your spandex or cycle down near vertical trails, then the Trek Marlin 4 is a great choice for you. If, however, you’re looking to spend more time on tougher and more rugged bike trails, then it’s worth heading a few notches up the range towards the Marlin 7 or Marlin 8.

Check out the specification list at the top of the page and you’ll see that the Marlin 4 has a great aluminum frame (which is light and strong) It has front suspension forks which reduce the amount of vibration from a bumpy trail surface from reaching your fingers and wrists. The Bontrager XR2 Comp tires give good grip and cornering on loose surfaces, and yet still feel smooth to ride when you’re on pavement. Top this off with 21 gears for getting you up hills easily and down hills quickly and you’ve got an excellent package.

The base model pricing of the Marlin 4 doesn’t come without a couple limitations though. First up, the Tektro disc brakes are mechanical rather than hydraulic. That means that they use a cable to pull the brake pads against the brake discs, rather than hydraulic brake fluid. These are still great brakes, giving you all the stopping power you need, however they add weight to the bike vs their hydraulic siblings. And bike weight is the second issue. Compared with the more expensive Marlin 8, the Marlin 4 is nearly three pounds heavier. Cycle for long distances or up lots of hills and you’ll definitely notice this extra weight. But, then, if you have the funds available and want extra spec, there are plenty of more advanced models in the Marlin range to choose from (Hint: I love the Marlin 6).

To sum up, if you’re looking for a great first bike for all-round use, taking you on regular trips to the trails, parks, beaches, and office, then the Marlin 4 is an awesome choice.

What is the difference between Trek Marlin 4 and 5?

One step up from the Trek Marlin 4 is the Marlin 5. With just over a hundred-dollar difference, is it worth stumping up the extra cash to trade-up?

Well, there are some general improvements to the components on the Marlin 5. With the key ones to note being the front forks, gearing, and brakes. Suspension on the front forks can now be locked. That means you choose when the forks are bouncy (to soak up rough terrain) or fixed (to make it easier to throw your weight behind uphill ascents). It’s a feature that I’m a big fan of.

Gearing has been changed so that, instead of 3×7 on the Marlin 4, there are now 2×8 on the Marlin 5. There are fewer gears, although in practice you won’t notice this. What you may notice is that there are likely to be fewer mechanical issues with 2-ring gearing than 3-ring in the long term – fewer issues meaning less downtime and less repair cost.

Finally, the brakes on the Marlin 5 use hydraulic brake fluid rather than the cable-pull mechanicals of the Marlin 4 brakes. These are lighter and are what you find on high-end mountain bikes.

Are these worth paying the extra for? Well, I ride a hardtail mountain bike that has a locking front suspension and it’s a feature that I really like as I use my bike on plenty of uphill smooth surfaces (as well as rougher trails). Doing those same uphills without locking suspension is harder but if your uphills are few are far between then this may not be an issue for you and therefore not worth paying for.

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• Marlin 4 Gen 2

Trek Marlin 4 Gen 2

Marlin 4 is the perfect gateway to trail riding. It's ideal for new riders who want a mountain bike with knobby tires that can double as a rugged commuter. Disc brakes, front suspension, 21 speeds, and mounts for a rack and fenders make this a great bike for new trail riders and campus commuters alike. It's right for you if... You want an introductory mountain bike at an incredible price but also want a commuter that's rugged enough to hop curbs on the way to class. The tech you get A lightweight aluminum frame with internal routing to protect your cables and add to the bike's sleek look, 21 speeds, a wide range of gearing so you always have the right gear for your terrain, powerful mechanical disc brakes, and a suspension fork that takes the edge off bumps and rough terrain. The final word Marlin is made for any adventure. The rack and fender mounts make it a great choice for commuters who want to get a little rad on the way to class or the grocery store. Why you'll love it - It's a real mountain bike that's also perfectly suited to daily commutes, rides around campus, or just getting from A to B on any surface - Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter - Smaller frame sizes (XS and S) have short-reach brake levers that make it easier and more comfortable for riders with smaller hands to brake confidently - Marlin models in XS and S frame sizes have a curved top tube and a lower standover height that makes it easier for smaller riders to mount and dismount - Like every model in the Marlin family, it's backed by Trek's lifetime warranty Wheel size: - Sizes X-Small – Small: 27.5-inch - Sizes Medium – XX-Large: 29-inch

Will my bike have a curved top tube?

Smaller frames (XXS-S) have a top tube that dips down as it approaches the seat tube. This design makes for a lower standover height, which is good for shorter riders because it allows them to straddle their bike more easily. The larger frames (M and up) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.

Due to supply-chain issues, Specs are subject to change without notice.

* Subject to change without notice.

Part Numbers

• Marlin 4 Gen 2

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Trek Marlin 4

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Size / XS, SM, MD, MD/LG, LG, XL, XXL

At a glance

Where to buy.

Specifications

• Frame aluminum frame
• Fork Size: XS, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel; Size: S, SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel; Size: M, ML, L, XL, XXL, SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel
• Hubs Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135x5mm QR
• Wheels Size: XS, S, Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve, Black; Size: XS, S, M, ML, L, XL, XXL, Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve; Size: M, ML, L, XL, XXL, Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
• Wheel Size 29" 27.5"
• Tires Size: XS, S, Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20''; Size: M, ML, L, XL, XXL, Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.20''; Size: M, ML, L, XL, XXL, Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.00''
• Chain KMC Z7, 7 speed
• Crank Size: XS, S, M, Shimano Tourney TY301, 42/34/24, 170mm length; Size: ML, L, XL, XXL, Shimano Tourney TY301, 42/34/24, 175mm length
• Bottom Bracket Size: XS, S, M, ML, L, XL, XXL, VP BC73, 73mm, threaded cartridge; Size: XS, S, M, ML, L, XL, XXL, Sealed cartridge, 73mm
• Front Derailleur Shimano Tourney TY300, 34.9mm clamp, down swing, down pull
• Rear Derailleur Shimano Tourney TY300, long cage, 34T max cog
• Shifters Shimano Altus EF500, 7 speed
• Brakeset Size: XS, S, M, ML, L, XL, XXL, Tektro MD-M280 mechanical disc, 160mm rotor; Size: XS, S, M, ML, L, XL, XXL, Tektro MD-M281 mechanical disc, 160mm rotor
• Handlebar Size: XS, S, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: M, ML, L, XL, XXL, Bontrager alloy, 31.8mm, 5mm rise, 720mm width
• Saddle Bontrager Arvada, steel rails, 138mm width
• Seatpost Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, XXL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length
• Stem Size: XS, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: S, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: M, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: ML, L, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: XL, XXL, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length
• Grips Bontrager XR Endurance Comp, lock-on
• Headset Semi-integrated, 1-1/8''

Q: How much is a 2023 Trek Marlin 4?

A 2023 Trek Marlin 4 is typically priced around $619 USD when new. Be sure to shop around for the best price, and also look to the used market for a great deal.

Q: Where to buy a 2023 Trek Marlin 4?

The 2023 Trek Marlin 4 may be purchased directly from Trek .

Q: What size wheels does the 2023 Trek Marlin 4 have?

The 2023 Trek Marlin 4 has 29" and 27.5" wheels.

Q: What size 2023 Trek Marlin 4 should I get?

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