Trek Marlin 5 Gen 3 2025 - Trail-Ready Hardtail with Modern Attitude
Zipping through town, dipping your toes into the trail for the first time or slicing through switchbacks, no matter where you roll, the Marlin is a confidence-inspiring hardtail that’s ready for anything. With versatile trail geometry and Smart Wheel Sizing, this hardtail MTB is built to tackle everything. There’s a good reason it’s the world’s favourite Trek.
Geometry
| Spec | 14.5" | 15.5" | 17.5" | 18.5" | 19.5" | 21.5" | 23" |
|---|---|---|---|---|---|---|---|
| Frame size letter | XS | S | M | ML | L | XL | XXL |
| Wheel size | 27.5" | 27.5" | 29" | 29" | 29" | 29" | 29" |
| A — Seat tube | 34.0 | 37.0 | 41.9 | 44.4 | 47.0 | 52.1 | 55.9 |
| B — Seat tube angle | 73.8° | 73.8° | 71.9° | 71.9° | 71.9° | 71.9° | 71.9° |
| Effective seat tube angle | 74.0° | 74.0° | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° |
| C — Head tube length | 9.0 | 10.0 | 9.0 | 9.0 | 10.0 | 12.0 | 12.0 |
| D — Head angle | 66.5° | 66.5° | 69.5° | 69.5° | 69.5° | 69.5° | 69.5° |
| E — Effective top tube | 55.1 | 57.9 | 60.2 | 61.8 | 63.8 | 65.9 | 67.3 |
| F — Bottom bracket height | 31.3 | 31.3 | 31.0 | 31.0 | 31.0 | 31.0 | 31.1 |
| G — Bottom bracket drop | 4.5 | 4.5 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 |
| H — Chainstay length | 43.3 | 43.3 | 43.8 | 43.8 | 43.8 | 43.8 | 43.8 |
| I — Offset | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 |
| J — Trail | 11.0 | 11.0 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 |
| K — Wheelbase | 109.2 | 112.1 | 110.0 | 111.6 | 113.7 | 115.9 | 117.3 |
| L — Standover | 65.8 | 69.2 | 74.8 | 75.8 | 75.7 | 76.9 | 80.4 |
| M — Frame reach | 39.0 | 41.5 | 41.8 | 43.4 | 45.1 | 46.6 | 48.0 |
| N — Frame stack | 56.3 | 57.2 | 60.2 | 60.2 | 61.1 | 63.0 | 63.0 |
- FRAME:
- Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew
- FRAME MATERIAL:
- Aluminium
- FORK BRAND:
- SR Suntour
- FORK:
- SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 42 mm offset for 29" wheel, 100 mm QR, 100 mm travel
- FORK TRAVEL:
- 100 mm
- WHEEL SIZE:
- 29
- WHEELS:
- Front Hub: Formula DC-20, alloy, 6-bolt, 5x100 mm QR / Rear Hub: Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR / Rim: Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve
- TYRES:
- Bontrager XT3 Comp, wire bead, 30 tpi, 29x2.40" / XS & S: 27.5x2.40"
- DROPPER SEATPOST:
- No
- SEATPOST:
- XS , S , M: Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length / ML , L , XL , XXL: Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
- SADDLE:
- Bontrager Verse Short, stainless steel rails
- CRANKSET:
- Size: ML , M , XS , S: Shimano CUES U4001, 32T, 52mm chain line, 170 mm length / L , XL , XXL: Shimano CUES U4001, 32T, 52mm chain line, 175mm length
- STEM:
- Size: XS , S Bontrager Comp, 31.8 mm, 7-degree, 35 mm length Size: ML , M , L Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length Size: XL Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 60 mm length Size: XXL Bontrager Comp, 31.
- GRIPS:
- Trek Line Comp, nylon lock-on
- SHIFTERS:
- Shimano U4000, 9-speed
- BRAKE BRAND:
- Tektro
- HYDRAULIC BRAKES:
- Yes
- BRAKES:
- Shimano MT200 hydraulic disc
- REAR DERAILLEUR:
- Shimano CUES U4000
- CHAIN:
- Shimano LG500
- NUMBER OF GEARS:
- 9 Speed
- PEDALS:
- VP-536 nylon platform
- FRONT MUDGUARD:
- MTB Monster Mudguard
- EXTRAS:
- n/a
- TYPE OF BIKE:
- Cross Country
- DESIGNED FOR:
- Speed and efficiency on the climbs, perfect for covering longer distances quickly due to a lightweight frame.
- IDEAL TERRAIN:
- Smoother, single-track off-road trails with minimal technical features. Can be used for both road and off-road riding.
- PLEASE NOTE:
- Trek 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, colours, materials and pricing.
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