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  • Marlin 4
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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 kerbs on the way to class. Disc brakes, knobby tyres and 21 speeds make Marlin 4 a great choice.

The tech you get

Marlin 4 has 21 speeds with a wide range of gearing for easy riding on varied terrain. It's modelled on our higher-end mountain bikes and built with a lightweight Alpha Silver Aluminium frame, mechanical disc brakes for increased stopping power in any weather conditions, and a suspension fork with 75 mm of travel – just enough to absorb the big bumps and keep you cruising.

The final word

Marlin 4's greatest gift is its versatility. It's built according to Trek's mountain bike heritage and is totally capable of taking on the trails. But it's an efficient daily rider, too. The rack and mudguard mounts make it a great choice for commuters who want to get a little rad on the way to class or the shops.

The Walkthrough

favorite_borderWhy you'll love it

  1. 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
  2. The flat mountain-style handlebar and disc brakes keep you in control, on or off the trail
  3. Rack and mudguard mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
  4. Like every Trek, it's backed by a lifetime warranty

"Look fast, feel fast, go fast."

"Unlike some bikes on the cheap end of the spectrum that cater to the recreational user, this one is aimed firmly at entry-level riders who want a bike that's affordable yet capable of riding and racing hard."

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How to: Wash your bike

A clean bike is a happy bike, but washing your ride is a bit more complicated than a quick spray with the hose or a joyride through your local car wash. Follow our step-by-step process and you’ll learn the dos and don’ts of keeping your bike in tip-top shape!

Watch the video


Features

Fit for every rider

Fit for every rider

Marlin comes in seven frame sizes to suit riders of any height, and Smart Wheel Size ensures you’re on the fastest wheel that fits. The smallest sizes even come with short-reach brake levers and narrower handlebars that give smaller riders better comfort and control.

Rack mounts

Rack mounts

Going for a long ride? Rack mounts make carrying accessories a breeze.

Blendr stem

Blendr stem

Bontrager stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.

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Specifications

  • Frameset

    Frame
    Alpha Silver Aluminium w/semi-integrated head tube, rack and mudguard mounts, G2 Geometry on 29ers
    Fork
    SR Suntour M-3030, coil spring, preload, 75 mm travel
    Max compatible fork travel
    100mm

  • Wheels

    Front hub
    Formula DC20 alloy
    Rear hub
    Formula DC31 alloy
    Rims
    Bontrager Connection 32-hole double-walled
    Tyres
    Bontrager XR2, 29x2.20˝ front, 29x2.00˝ rear (13.5 & 15.5: 27.5x2.20˝)
    Max tyre size
    29x2.20" (XS & S: 27.5x2.4")

  • Drivetrain

    Shifters
    Shimano Altus EF500, 7 speed
    Front derailleur
    Shimano Tourney TY500
    Rear derailleur
    Shimano Tourney TY300
    Crank
    Shimano Tourney TY301, 42/34/24
    Max. chainring size
    1x: 32T, 3x: 42T
    Bottom bracket
    Sealed cartridge
    Cassette
    Shimano TZ21 14-28, 7 speed
    Chain
    KMC Z51
    Pedals
    Wellgo nylon platform

  • Components

    Saddle
    Bontrager Evoke 1
    Seatpost
    Bontrager SSR, 2-bolt head, 27.2mm, 12mm offset
    Handlebar
    Bontrager alloy, 31.8mm, 15mm rise
    Grips
    Bontrager Satellite Plus, ergonomic
    Stem
    Bontrager alloy, 31.8mm, 7 degree, Blendr compatible
    Head set
    Semi-integrated, 1-1/8˝
    Brake set
    Tektro M280 mechanical disc

  • Weight

    Weight
    M – 14.10 kg / 31.08 lb (with tubes)
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

Frame size number Frame size letter Wheel size A — Seat tube B — Seat tube angle Effective seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
13.5 XS 27.5" 34.3 73.5° 73.5° 9.0 69.3° 54.4 29.2 5.8 43.8 4.2 8.8 104.9 65.8 37.6 56.5
15.5 S 27.5" 36.8 73.5° 73.5° 9.0 69.3° 55.5 30.2 4.8 43.8 4.2 8.8 106.6 68.6 38.5 57.4
17.5 M 29" 41.9 71.9° 73.0° 9.0 69.5° 60.2 31.1 5.8 43.8 4.2 9.3 110.0 74.8 41.8 60.2
17.5 M 29" 41.9 71.9° 73.0° 9.0 69.5° 60.2 31.0 5.8 43.8 4.2 9.3 110.0 74.8 41.8 60.2
18.5 ML 29" 44.4 71.9° 73.0° 9.0 69.5° 61.8 31.0 5.8 43.8 4.2 9.3 111.6 75.8 43.4 60.2
19.5 L 29" 47.0 71.9° 73.0° 10.0 69.5° 63.8 31.0 5.8 43.8 4.2 9.3 113.7 75.7 45.1 61.1
21.5 XL 29" 52.1 71.9° 73.0° 12.0 69.5° 65.9 31.0 5.8 43.8 4.2 9.3 115.9 76.9 46.6 63.0
23.0 XXL 29" 55.9 71.9° 73.0° 12.0 69.5° 67.3 31.1 5.8 43.8 4.2 9.3 117.3 80.4 48.0 63.0

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