Trek Marlin: suspension setup & specs
The Trek Marlin is a cross-country hardtail with 100–110 mm of fork travel. This page lists the 4 current builds with fork and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Trek Marlin →
All builds
Fork, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Weight | RRP | Calculator |
|---|---|---|---|---|
| 4 Gen 3 | SR Suntour XCM30 (110 mm) | – | €579 | Setup → |
| 5 Gen 3 | SR Suntour XCT 30 (100 mm) | – | €679 | Setup → |
| 6 Gen 3 | RockShox Judy (100 mm) | – | €949 | Setup → |
| 7 Gen 3 | RockShox Judy (100 mm) | – | €1,099 | Setup → |
How it compares
100–110 mm at the fork almost exactly matches the 100 mm median of the 46 bikes in the “cross-country hardtail” category in our database. Among Trek’s mountain bikes, the Trek Marlin has the shortest fork travel. Trek builds the frame from aluminium.
Entry costs €579 for the 4 Gen 3 build – less than the category median of €1,450. For the 7 Gen 3 build, Trek asks €1,099. In total, 3 different forks are used, from the SR Suntour XCM30 to the RockShox Judy.
Setup notes for this spec
- Air fork (RockShox Judy): the air valve is on top of the left leg under a cap. Change pressure in small steps (about 5 psi (0.34 bar)) and cycle the fork a few times afterwards so the air chambers can equalise.
- Rebound: turn the red RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Hardtail: without rear suspension, rear tyre pressure largely decides comfort and traction – it is worth testing in 0.1 bar (1.5 psi) steps.
Target SAG for the Trek Marlin
The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion. Adjust the air pressure until the value is right. If Trek specifies its own target SAG for your model, that takes priority.
110 mm fork (4 Gen 3)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 19 mm |
| Trail | 20 % = 22 mm |
| Enduro / rough | 22 % = 24 mm |
| Bike park | 20 % = 22 mm |
100 mm fork (5 Gen 3, 6 Gen 3, 7 Gen 3)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 17 mm |
| Trail | 20 % = 20 mm |
| Enduro / rough | 22 % = 22 mm |
| Bike park | 20 % = 20 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
The values apply to 2.40″ wide tubeless tyres with a trail casing. With an inner tube add about 0.2 bar (2.9 psi), with an insert take off about 0.1 bar (1.5 psi).
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.43 bar (21 psi) | 1.63 bar (24 psi) |
| 70 kg | 1.55 bar (22 psi) | 1.75 bar (25 psi) |
| 80 kg | 1.67 bar (24 psi) | 1.87 bar (27 psi) |
| 90 kg | 1.79 bar (26 psi) | 1.99 bar (29 psi) |
| 100 kg | 1.91 bar (28 psi) | 2.11 bar (31 psi) |
| 110 kg | 2.03 bar (29 psi) | 2.23 bar (32 psi) |
| 120 kg | 2.15 bar (31 psi) | 2.35 bar (34 psi) |
Air pressure in the fork
The sticker on the fork and the manufacturers’ setup charts give you a first pressure. Our calculator is more precise and suggests rebound too – always check the result via SAG.