Trek Marlin 4 Gen 3 Mountain Bike 2026 - Hardtail MTB
The Trek Marlin 4 Gen 3 brings a fresh feel to an MTB favourite, with trail-capable geometry and practical features that suit riders of all levels. Built around a redesigned Alpha Silver Aluminium frame, the Marlin 4 gains a longer, slacker shape that gives it extra stability and confidence when descending or cornering, whether you're exploring forest tracks or navigating urban backroads.
Key Features:
- Alpha Silver Aluminium frame with internal cable routing and trail-inspired geometry
- SR Suntour XCE 28 coil fork with 100 mm travel
- Shimano ESSA U2000 8-speed drivetrain with ProWheel chainset
- Tektro HD-M275 hydraulic disc brakes front and rear
- 29"/27.5" Bontrager Connection wheels with Montrose Comp tyres
- Rack and kickstand mounts for commuter versatility
- Available with 0% APR finance
Up front, the SR Suntour XCE 28 fork offers 100 mm of suspension travel with a coil spring and adjustable preload, helping to smooth out bumps and rough patches on the trail. Shimano’s 8-speed ESSA U2000 rear derailleur teams up with a wide-range 11-45T cassette, giving you enough gearing to spin up steep climbs and cruise flats with ease. The ProWheel narrow-wide chainring adds chain security on uneven ground.
Tektro HD-M275 hydraulic disc brakes give you strong and reliable stopping power—ideal for mixed-weather riding or varied terrain. Bontrager Montrose Comp tyres wrap around robust double-wall Bontrager Connection rims, delivering grip and support without weighing you down. Depending on size, the Marlin 4 rolls on either 29" or 27.5" wheels to suit rider fit and handling preferences.
What makes the Marlin 4 especially versatile is the inclusion of rack and kickstand mounts, so you can easily adapt it for commuting, carrying gear or day-to-day errands. The frame is also dropper post ready, giving you the option to upgrade for even more control on the descents.
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 | SR Suntour XCE 28, coil spring, preload, 100 mm QR |
| Front Brake | Tektro HD-M275 hydraulic disc // Tektro HD-M275 hydraulic disc |
| Rear Brake | Tektro HD-M275 hydraulic disc // Tektro HD-M275 hydraulic disc |
| Rear Mech | Shimano ESSA U2000 |
| Speed | 8 |
| Rims | Bontrager Connection, double-wall, 32-hole, 20 mm width, Schrader valve |
| 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 |
| Front Tyre | Bontrager Montrose comp, wire bead, 30 tpi |
| Rear Tyre | Bontrager Montrose comp, wire bead, 30 tpi |
| Saddle | Bontrager Verse Short, stainless steel rails |
| Chainset | ProWheel alloy, 32T narrow-wide steel ring |
| Chain | KMC Z8.3, 8-speed |
| Cassette | Shimano HG300, 11-45, 8-speed |
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 4 Gen 3 Mountain Bike 2026 - Hardtail MTB
Love the bike, happy with the price and the service from Tredz was excellent. Quick delivery and very well built and packaged
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