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It's right for you if...
You're new to the trail and you’re looking for a real mountain bike that doubles as a commuter – and you want it all at an exceptional value.
The tech you get
A lightweight aluminium frame with internal shift cable and brake hose 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 hydraulic disc brakes and a suspension fork that takes the edge off bumps and rough terrain.
The final word
It’s built in Trek's MTB heritage, so you get a great ride for all your adventures. But it's also versatile, and Marlin 5 is a popular ride on college campuses because the rack and kickstand mounts make it easy to accessorise and haul a load.
The Walkthrough
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
- 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
- Rack and kickstand mounts make it easy to accessorise, so your mountain bike can double as a rugged commuter
- Like every Trek, it's backed by a lifetime warranty
How to: Fix a flat tyre
Flat? Fixed. Our simple how-to video will show you how to get back on two wheels in no time flat.
Watch the video
"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."
Learn more
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
How to: Pump your tyres
Setting your bike's tyre pressure correctly will give you a more comfortable ride with better grip and handling. Even better, it can help prevent flats
Watch the videoFeatures
Will my bike have a curved top tube?
Smaller frames (XS and 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 ML) have a straight top tube because taller riders with longer legs typically don’t have the same issues with standover height.
High tech, high value
Marlin looks and feels great. It’s packed with features usually found only on more expensive bikes, like a stylish frame with internal shift cable and brake hose routing, which can help your cables last longer by protecting them from the elements.
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
Going for a long ride? Rack mounts make carrying accessories a breeze.
Rear kickstand mount
Chainstay mounts make it easy to install a rear kickstand that stays out of your way and supports bikes of all sizes. No more laying or leaning.
Blendr stem
Bontrager stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.
Learn more
Internal cable routing
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Alpha Silver Aluminium, internal routing, chainstay disc-brake mount, rack and kickstand mount, 135x5 mm QR |
|---|---|
| *Fork |
Size:
XS SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5" wheel, 100 mm QR, 80 mm travel |
|
Size:
S SR Suntour XCE 28, coil spring, preload, 42 mm offset for 27.5" wheel, 100 mm QR, 100 mm travel |
|
|
Size:
M , ML , L , XL , XXL SR Suntour XCE 28, coil spring, preload, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel |
|
| Max compatible fork travel | 100mm (XS & S: 490mm axle-to-crown, M & up: 509mm axle-to-crown) |
| Hub front | Formula DC-20, alloy, 6-bolt, 5x100 mm QR |
|---|---|
| Hub rear | Formula DC-27, alloy, 6-bolt, 7sp freehub, 135x5 mm QR |
| Rim | Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve |
| Spokes | 14 g stainless steel |
| *Tyre |
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" |
|
| Max tyre size | Frame: 29x2.20" (XS & S: 27.5x2.4") Fork: See manufacturer |
| *Shifter |
Size:
XS , S , M , ML , L , XL , XXL Shimano Altus M315, 3-speed |
|---|---|
|
Size:
XS , S , M , ML , L , XL , XXL Shimano Altus M315, 7-speed |
|
| Front derailleur | Shimano Tourney TY300, 34.9 mm clamp, down swing, down pull |
| Rear derailleur | Shimano Tourney TY300, long cage, 34T max cog |
| *Crank |
Size:
XS , S , M Shimano Tourney TY301, 42/34/24, 170 mm length |
|
Size:
ML , L , XL , XXL Shimano Tourney TY301, 42/34/24, 175 mm length |
|
| Bottom bracket | VP BC73, 73 mm, threaded cartridge |
| Cassette | Shimano HG200, 12-32, 7-speed |
| Chain | KMC Z7, 7-speed |
| Pedal | VP-536 nylon platform |
| Max. chainring size | 1x/2x: 34T, 3x: 42T |
| Saddle | Bontrager Arvada, steel rails, 138 mm width |
|---|---|
| *Seatpost |
Size:
XS , S , M Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length |
|
Size:
ML , L , XL , XXL Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length |
|
| *Handlebar |
Size:
XS Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width |
|
Size:
S , M , ML , L , XL , XXL Bontrager alloy, 31.8 mm, 5 mm rise, 720 mm width |
|
| Grips | Bontrager XR Endurance Comp |
| *Stem |
Size:
XS Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 50 mm length |
|
Size:
S Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length |
|
|
Size:
M Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length |
|
|
Size:
ML , L Bontrager alloy, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length |
|
|
Size:
XL , XXL Bontrager alloy, 31.8 mm clamp, Blendr-compatible, 7-degree, 90 mm length |
|
| Head set | Semi-integrated, 1-1/8" |
| Brake | Tektro HD-M275 hydraulic disc |
| Weight | M - 14.44 kg / 31.84 lbs (with tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
Sizing & Tech
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 retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
Rider Height
Inseam
XS
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
M/L
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
L
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
2XL
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 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 | 31.0 | 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 |