Trek Marlin 7 Gen 3 Mountain Bike 2026 - Hardtail MTB
The Trek Marlin 7 Gen 3 balances performance and value with its lightweight Alpha Silver aluminium frame, 100mm RockShox Judy Silver fork, SRAM NX Eagle 12-speed drivetrain and Shimano hydraulic disc brakes for confident, trail-ready handling.
Key Features:
- Alpha Silver aluminium frame with modern trail geometry
- RockShox Judy Silver fork, 100mm travel with lockout
- SRAM NX Eagle 1x12 drivetrain with wide-range cassette
- Shimano MT200 hydraulic disc brakes
- Bontrager Kovee tubeless-ready wheels
- Maxxis Rekon 29x2.40” tubeless-ready tyres
- Dropper post with internal routing included
- Available with 0% APR finance
The Trek Marlin 7 Gen 3 is designed for riders looking to take their first steps into proper trail riding while still offering plenty of scope for progression. At the heart of the bike is a lightweight Alpha Silver aluminium frame with modern trail geometry. It features internal cable routing for a clean look and protection, as well as rack and kickstand mounts for everyday versatility.
Up front, the RockShox Judy Silver suspension fork delivers 100mm of controlled travel, helping absorb bumps and roots while maintaining steering precision. With an air spring, rebound adjustment and hydraulic lockout, it can be tuned to suit the rider’s weight and terrain, adding confidence on technical trails.
The SRAM NX Eagle 12-speed rear derailleur, paired with an SX Eagle shifter, provides smooth, reliable shifting across a wide-range 11-50T cassette. This 1x12 setup keeps gearing simple while offering plenty of range for climbing and fast-paced sections alike. Braking power comes from Shimano MT200 hydraulic discs, giving controlled stopping in all conditions.
Bontrager Kovee tubeless-ready wheels are fitted with Maxxis Rekon 29x2.40” tyres, combining fast rolling speed with grip for mixed trail conditions. The wheels can easily be set up tubeless for lower pressures, better traction and fewer punctures. A TranzX internally routed dropper post is included as standard, helping riders lower the saddle quickly for descents.
Comfort and control are supported by Bontrager finishing kit, including a short stem and wide alloy bar for stability, and a Bontrager Verse Short saddle designed for efficiency and comfort. Weighing just over 14kg, the Marlin 7 strikes a fine balance between agility and durability.
For riders looking for a confidence-inspiring mountain bike that’s capable of developing skills on trails, the Trek Marlin 7 Gen 3 is a great choice, with its suspension fork, wide gearing and trail-ready features making it a solid step into off-road adventure.
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 Silver, Solo Air spring, rebound adjust, TurnKey hydraulic 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 |
| Bars | Bontrager alloy, 31.8 mm, 15 mm rise |
| Front Brake | Shimano MT200 Hydraulic Disc |
| Rear Brake | Shimano MT200 Hydraulic Disc |
| Brake Lever | SHIMANO MT200 |
| Rear Mech | SRAM NX Eagle, 12-speed |
| Shifters | SRAM SX Eagle, 12-speed |
| Speed | 12 |
| Rims | Bontrager Kovee, double-wall, Tubeless-Ready, 28-hole, 23 mm width, Presta valve // Bontrager Kovee, double-wall, Tubeless-Ready, 32-hole, 23 mm width, Presta valve |
| Front Hub | Formula DC-20 LW, alloy, 6-bolt, 5x100 mm QR |
| Rear Hub | Formula DC-22LW, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR |
| Front Tyre | Maxxis Rekon, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.40'' |
| Rear Tyre | Maxxis Rekon, tubeless ready, EXO casing, folding bead, 60 tpi, 29x2.40'' |
| Seat Post | TranzX JD-YSI34, internal routing, 34.9 mm, |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Chainset | SRAM SX Eagle, 30T steel ring, 49 mm chainline |
| Bottom Bracket | Truvativ Powerspline, 73 mm, threaded cartridge, 118 mm spindle |
| Chain | SRAM SX Eagle, 12-speed |
| Cassette | SRAM PG-1210 Eagle, 11-50, 12-speed |
| Weight | 14.15 kg |
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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Trek Marlin 7 Gen 3 Mountain Bike 2026 - Hardtail MTB
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