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. Disc brakes, knobby tires, 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 modeled after our higher-end mountain bikes and built with a lightweight Alpha Silver Aluminum frame, mechanical disc brakes for increased stopping power in any weather conditions, and a suspension fork with 75mm 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 in Trek's mountain bike heritage and totally capable of taking on the trails. But it's an efficient daily rider, too. 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.
favorite_borderWhy 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
- The flat mountain-style handlebar and disc brakes keep you in control, on or off the trail
- Rack and fender mounts make it easy to accessorize, so your mountain bike can double as a rugged commuter
- Like every model in the Marlin family, it's backed by Trek's lifetime warranty
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Alpha Silver Aluminum
Our proprietary lightweight aluminum is continuously cold extruded to a single wall thickness for durable performance.
Smart Wheel Size
The right wheel size paired with your frame size gives you the perfect combination of responsiveness and control.
Mechanical disc brakes
Reliable stopping power in all conditions, including wet and muddy.
Going for a long ride? Rack mounts make carrying accessories a breeze.
Extended size range
A wider range of sizes than the industry standard provides more option for everyone, from tallest to shortest and all those in between. Because everyone deserves a great ride.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Silver Aluminum, rack & fender mounts, 135x5mm QR|
|Fork||SR Suntour M-3030, coil spring, preload, 100mm QR, 75mm travel|
|Front Hub||Formula DC-20, alloy, 6-bolt, 5x100mm QR|
|Rear Hub||Formula DC-31, alloy, 6-bolt, 6/7/8 speed freewheel, 135x5mm QR|
|Rim||Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve|
|Spokes||14g stainless steel|
|Tire||Bontrager XR2, 29x2.20'' front, 29x2.00'' rear (13.5 & 15.5'': 27.5x2.20'')|
|Shifter||Shimano Altus EF500, 7 speed|
|Front Derailleur||Shimano Tourney TY500, 34.9mm clamp, top swing, dual pull|
|Rear Derailleur||Shimano Tourney TY300, long cage, 34T max cog|
|Crank||Shimano Tourney TY301, 42/34/24, 170mm length|
|Bottom Bracket||VP BC73, 73mm, threaded cartridge|
|Cassette||Shimano TZ21 14-28, 7 speed|
|Pedal||Wellgo nylon platform|
|Saddle||Bontrager Evoke 1, steel rails|
XS , S
Bontrager alloy, 27.2mm, 12mm offset, 330mm length
M , ML , L , XL , XXL
Bontrager alloy, 27.2mm, 12mm offset, 400mm length
Bontrager alloy, 27.2mm, 12mm offset, 360mm length
|Handlebar||Bontrager Riser, 25.4mm, 30mm rise, 620mm width|
|Grips||Bontrager Satellite Plus|
XS , S
Bontrager alloy, 25.4 mm clamp, 15-degree, 60 mm length
M , ML , L , XL
Bontrager alloy, 25.4mm clamp, 10 degree, 90mm length
Bontrager alloy, 25.4mm clamp, 10 degree, 110mm length
|Brake||Tektro MD-M280 mechanical disc, 160mm rotor|
|Weight||M - 14.10 kg / 31.08 lbs (with tubes)|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).|
Sizing & fit
The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
153.0 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise noted.
|Frame size number||Frame size letter||Wheel size||A — Seat tube||B — 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|