Trek Marlin 6 Gen 3 Mountain Bike 2025 - Hardtail MTB
From woodland paths to weekday commutes, the Marlin 6 Gen 3 is a great all-rounder. With trail-ready geometry, a RockShox suspension fork and smooth Shimano 10-speed shifting, it’s built for off-road confidence and everyday versatility.
Key Features:
- Alpha Silver Aluminium frame with modern trail geometry and internal routing
- RockShox Judy coil spring fork with 100mm travel and TurnKey lockout
- Shimano CUES U6000 10-speed drivetrain with wide 11–48T cassette
- Tektro 160mm hydraulic disc brakes for consistent stopping power
- 29" Bontrager Kovee wheels with Maxxis Ikon 2.35" tubeless-ready tyres
- ThruSkew axle, mudguard mounts and dropper post compatible
- Available with 0% APR finance
The Trek Marlin 6 Gen 3 offers an ideal step up for riders who want a real taste of trail performance with the flexibility for day-to-day use. The Alpha Silver Aluminium frame is lightweight, strong and built with modern trail geometry. Longer and slacker than previous generations for improved stability and control when descending or navigating more technical terrain.
The front end is supported by a RockShox Judy suspension fork with 100mm of coil-sprung travel, smoothing out rough paths and trails. The TurnKey lockout means you can firm it up for tarmac or climbing. With a wide 11–48T cassette, the Shimano CUES 10-speed drivetrain delivers reliable, fuss-free shifting whether you're on steep climbs or flat stretches.
Braking is handled by Tektro hydraulic discs with 160mm rotors, giving predictable stopping power in all conditions. Maxxis Ikon 2.35” tyres on tubeless-ready Bontrager Kovee wheels provide great traction, comfort and upgrade potential if you’re planning to push further off-road.
Useful details like internal cable routing, dropper post compatibility, and rack and kickstand mounts mean you can easily customise the Marlin for bikepacking, commuting or weekend loops. Smaller frame sizes (XXS and XS) feature a curved top tube for easier mounting and dismounting for younger or shorter riders.
The Marlin 6 Gen 3 hits a sweet spot between capability and comfort, offering a confident ride on light trails and fire roads, with the practicality to be your everyday workhorse or weekend explorer. A great value hardtail for growing your skills and exploring new terrain.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | Alpha Silver Aluminium, internal derailleur and dropper post routing, rack and kickstand mount, 135x5 mm ThruSkew |
| Fork | RockShox Judy, coil spring, preload, TurnKey lockout, 46 mm offset for 29" wheel, 100 mm QR, 100 mm travel |
| Headset | Semi-Integrated, 1-1/8" |
| Stem | Bontrager Comp, 31.8 mm, Blendr compatible, 7-degree, 50 mm length |
| Bars | Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width |
| Front Brake | Tektro, 6-bolt, 160mm |
| Rear Brake | Tektro, 6-bolt, 160mm |
| Rear Mech | Shimano CUES U6000 GS |
| Shifters | Shimano U6000, 10-speed |
| Speed | 10 |
| Rims | Bontrager Kovee, double-wall, Tubeless-Ready, 28-hole, 23 mm width, Presta valve |
| Front Hub | Formula DC-20, alloy, 6-bolt, 100 mm ThruSkew |
| Rear Hub | Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR |
| Front Tyre | Maxxis IKON, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.35'' |
| Rear Tyre | Maxxis IKON, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.35'' |
| Seat Post | Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Chainset | FSA Alpha Drive, 30T, 175 mm length |
| Bottom Bracket | FSA, 73 mm, threaded cartridge, 122.5 mm spindle |
| Chain | Shimano LG500 |
| Cassette | Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed |
| Pedals | VP-536 nylon platform |
Trek Marlin Gen 3 Sizing Guide
| Size | Height (cm) | Height (Feet / Inches) | Inseam (cm) | Inseam (Inches) |
|---|---|---|---|---|
| XS | 145 - 155 cm | 4'9" - 5'1" | 69 - 73 cm | 27" - 29" |
| S | 155 - 165 cm | 5'1" - 5'5" | 74 - 78 cm | 29" - 31" |
| M | 165 - 176 cm | 5'5" - 5'9" | 79 - 83 cm | 31" - 33" |
| ML | 173 - 180 cm | 5'8" - 5'11" | 81 - 86 cm | 32" - 34" |
| L | 177 - 188 cm | 5'10" - 6'2" | 84 - 89 cm | 33" - 35" |
| XL | 188 - 195 cm | 6'2" - 6'5" | 89 - 91 cm | 35" - 36" |
| XXL | 195 - 203 cm | 6'5" - 6'8" | 91 - 97 cm | 36" - 38" |
What size frame do I need if I am between sizes? - read here
Trek Marlin Gen 3 Geometry Chart
| Size | XS | S | M | ML | L | XL | XXL |
|---|---|---|---|---|---|---|---|
| Stack | 563 | 572 | 601 | 614 | 618 | 637 | 651 |
| Reach | 390 | 415 | 440 | 455 | 470 | 495 | 520 |
| Head Tube Length | 90 | 100 | 105 | 110 | 115 | 135 | 150 |
| Head Tube Angle | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° | 66.5° |
| Bottom Bracket Height | 313 | 313 | 308 | 308 | 308 | 308 | 308 |
| Bottom Bracket Drop | 45 | 45 | 60 | 60 | 60 | 60 | 60 |
| Trail | 110 | 110 | 110 | 110 | 110 | 110 | 110 |
| Fork Rake/Offset | 42 | 42 | 46 | 46 | 46 | 46 | 46 |
| Chainstay Length | 433 | 433 | 438 | 438 | 438 | 438 | 438 |
| Wheelbase | 1092 | 1121 | 1153 | 1180 | 1197 | 1230 | 1261 |
| Top Tube Length (horizontal) | 551 | 579 | 615 | 631 | 647 | 678 | 707 |
| Standover Height | 658 | 692 | 747 | 759 | 771 | 791 | 816 |
| Seat Tube Length | 340 | 370 | 420 | 435 | 450 | 500 | 540 |
| Seat Tube Angle | 73.8° | 73.8° | 73.4° | 73.4° | 73.4° | 73.4° | 73.4° |
| Effective Seat Tube Angle | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° | 74.0° |
All measurements are in mm unless otherwise stated.
The above table shows the standard geometry for the bicycle as shipped, other geometry configurations may be available with certain bikes. Please contact us via Live Chat to find out more.
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