Trek Marlin range
Trek Marlin: the hardtail that does a bit of everything
From your first proper trail ride to the weekday run into town, the Marlin is the Trek hardtail riders keep coming back to. Every Marlin hardtail shares the same Gen 3 Alpha Silver Aluminium frame, with trail-friendly geometry, internal cable routing and mounts for a rack and kickstand. Move up the range and you get a smoother fork, more gears and a few clever extras.
Want a hand on the climbs? The Marlin+ 8 adds Bosch power to the same easy-going character. Prices and stock on this page update automatically, so every bike you see is one we can get to you.
Choose your Marlin
One frame, four levels of kit. Here is how each model steps up.
Marlin 4
A dependable, easy-to-live-with hardtail for exploring trails and getting about town.
- SR Suntour coil-sprung suspension fork
- Shimano ESSA 8-speed with an 11–45 cassette
- Tektro hydraulic disc brakes
- Widest size run, XXS to XXL (26" wheels on XXS)
Marlin 5
Adds a lockout fork and long-lasting Shimano CUES gearing for longer rides.
- SR Suntour XCT 30 coil fork with hydraulic lockout
- Shimano CUES 9-speed with LINKGLIDE, 11–46
- Shimano MT200 hydraulic disc brakes
- Sizes XS to XXL
Marlin 6
A RockShox fork and a dropper post make this the Marlin for riders who want to push on.
- RockShox Judy coil fork, 100mm travel, TurnKey lockout
- Shimano CUES 10-speed, 11–48
- TranzX dropper post, 100–170mm by size
- Tubeless-ready Bontrager Kovee rims
Marlin 7
Air-sprung RockShox suspension and SRAM 12-speed for the most capable Marlin hardtail.
- RockShox Judy Silver air fork, 100mm, rebound adjust
- SRAM NX Eagle 12-speed, 11–50
- Maxxis Rekon 2.4" tubeless-ready tyres
- TranzX dropper post, 100–170mm by size
Marlin+ 8: the same spirit, with a boost
The Marlin+ 8 takes everything riders like about the Marlin and adds a Bosch Active Line Plus motor, so steep climbs and longer loops feel well within reach. It is built on a sturdier Alpha Gold Aluminium frame with 29" wheels from Medium up, 120mm of air-sprung RockShox suspension and four-piston Shimano brakes on large 203mm rotors.
The Bosch CompactTube 400Wh battery sits inside the down tube, and the Purion 200 display keeps things simple: choose your assist level and ride. Mounts for a rack, mudguards and kickstand make it just as handy for the commute as it is in the woods.
- Motor
- Bosch Active Line Plus, 50Nm
- Battery
- Bosch CompactTube 400Wh
- Display
- Bosch Purion 200
- Fork
- RockShox Recon Silver RL, 120mm
- Gears
- Shimano Deore 12-speed, 10–51
- Brakes
- Shimano 4-piston, 203mm rotors
- Tyres
- Bontrager Gunnison Pro XR 29x2.60"
- Sizes
- S to XL
Shop the Marlin range
Why riders pick a Marlin
A frame that grows with you
Gen 3 Alpha Silver Aluminium with trail-friendly geometry that keeps you composed on the way down and comfortable on the way home.
Smart Wheel Size
Trek matches wheel size to frame size: 27.5" wheels on XS and S, 29" from Medium up and 26" on the Marlin 4 XXS, so every rider gets wheels that fit.
Suspension where it counts
Every Marlin has a front suspension fork to smooth out roots and rough tracks, stepping up from SR Suntour coil to RockShox Judy and Judy Silver air.
Simple, wide-range gears
Single-ring drivetrains from Shimano and SRAM mean one shifter, easy maintenance and a low gear for steep climbs.
Weekday ready
Rack and kickstand mounts on every Marlin hardtail make it easy to turn your trail bike into a commuter or errand bike.
Hydraulic disc brakes
Consistent stopping in all weathers, with a larger 180mm front rotor on Medium frames and up across the Marlin hardtails.
Finding your Marlin size
The Marlin comes in up to eight frame sizes. Start with your height, then check your inside leg against the chart. If you sit between two sizes, the smaller frame tends to feel nimbler and the larger one more settled at speed.
Sizes vary by model: the Marlin 4 runs XXS to XXL, the Marlin 5, 6 and 7 run XS to XXL, and the Marlin+ 8 runs S to XL.
Not sure? We will help. Pop into our shop at 365 Long Road, Canvey Island for a sizing check, or send us your height and inside leg and we will recommend a size.
| Size | Rider height | Inside leg | Wheel |
|---|---|---|---|
| XXS | 135–145 cm (4'5"–4'9") | 64–68 cm | 26" |
| XS | 145–155 cm (4'9"–5'1") | 69–73 cm | 27.5" |
| S | 155–165 cm (5'1"–5'5") | 74–78 cm | 27.5" |
| M | 165–177 cm (5'5"–5'10") | 79–83 cm | 29" |
| ML | 173–180 cm (5'8"–5'11") | 81–86 cm | 29" |
| L | 177–188 cm (5'10"–6'2") | 84–89 cm | 29" |
| XL | 188–195 cm (6'2"–6'5") | 89–91 cm | 29" |
| XXL | 195–203 cm (6'5"–6'8") | 91–97 cm | 29" |
Trek's sizing guide. XXS is Marlin 4 only; ML and XXL are hardtail only.
Trek Marlin FAQs
Which Marlin is right for me?
For towpaths, bridleways and town, the Marlin 4 or 5 suits you well. For more technical trails, the Marlin 6 and 7 add RockShox suspension and a dropper post. For help on the hills, choose the Marlin+ 8 e-bike.
What is the difference between the Marlin and the Marlin+?
The Marlin+ 8 is the electric version. It has a Bosch Active Line Plus motor and a 400Wh battery, a sturdier Alpha Gold Aluminium frame, a 120mm air fork, 2.6" tyres and four-piston brakes.
Can I buy a Marlin through Cycle to Work?
Yes. We work with Cycle to Work schemes, so you can spread the cost through your salary. See our Cycle to Work page for the schemes we accept and how to apply.
Do you deliver the Marlin?
Yes, we deliver across the UK, or you can collect from our shop on Canvey Island. See our delivery information for costs and timescales.
Is the Marlin good for commuting?
Very. Every Marlin hardtail has rack and kickstand mounts, and the Marlin+ 8 adds mudguard mounts, so it is easy to set up for the daily ride.
Can a dropper post be fitted to the Marlin 4 or 5?
Yes. The Gen 3 frame has internal dropper post routing, so our workshop can fit one for you. Just ask when you order.
What wheel size will I get?
Trek uses Smart Wheel Size: XS and S frames come with 27.5" wheels, Medium and larger with 29" wheels, and the Marlin 4 XXS with 26" wheels.