Marin Alpine Trail: suspension setup & specs
The Marin Alpine Trail is an enduro bike with 170 mm of fork travel and 160 mm at the rear. This page lists the 2 current builds with fork, shock and shock size and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Marin Alpine Trail →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, weight and price according to the manufacturer. Wheel size: MX.
| Build | Fork | Shock | Shock size | Rear travel | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|
| 1 | X-Fusion Vengence (170 mm) | X-Fusion H3A Air | 205x65 | 160 mm | – | – | Setup → |
| XR | RockShox Zeb Ultimate (170 mm) | RockShox Vivid Air Ultimate | 205x65 | 160 mm | – | – | Setup → |
How it compares
On travel, the Marin Alpine Trail is right where the “enduro bike” category usually is: 170 mm up front against a median of 170 mm from 41 bikes. The fork has 10 mm more travel than the rear end with 160 mm – a common layout that takes load off the front on steep terrain. Within Marin’s mountain bikes, it sits between the Marin Rift Zone and the Marin Quake on travel.
For suspension, Marin combines components from RockShox and X-Fusion. In total, 2 different forks are used, from the X-Fusion Vengence to the RockShox Zeb Ultimate.
Setup notes for this spec
- Fork (RockShox Zeb Ultimate): air goes in through the valve on top of the left leg. After every change, compress the fork firmly a few times before measuring SAG.
- Rebound: turn the red RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Shock (X-Fusion H3A Air): get on the bike in your normal riding position, step off carefully and read the O-ring. Always cycle the shock a few times after pumping.
Target SAG for the Marin Alpine Trail
The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If Marin specifies its own target SAG for your model, that takes priority.
170 mm fork, 65.0 mm shock stroke (all builds)
| Riding style | Fork SAG | Shock SAG |
|---|---|---|
| XC / touring | 17 % = 29 mm | 24 % = 15.6 mm on the shock shaft |
| Trail | 20 % = 34 mm | 28 % = 18.2 mm on the shock shaft |
| Enduro / rough | 22 % = 37 mm | 30 % = 19.5 mm on the shock shaft |
| Bike park | 20 % = 34 mm | 27 % = 17.6 mm on the shock shaft |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
The values apply to 2.50″ 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). Stock tyres: Front: Maxxis Assegai MAXX GRIP, 29x2.5" EXO+ | Rear: Maxxis Minion DHR II, MAXXTERRA, 27.5x2.5" DoubleDown, Tubeless compatible; Front: Schwalbe Magic Mary, Trail, Ultra Soft, Radial, 29x2.5" | Rear: Schwalbe Albert, Trail, Soft, Radial, 27.5x2.5".
| 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 and shock
You will find a guide value for air pressure on the fork sticker (or on the shock) or in the suspension makers’ charts. Our calculator also takes riding style and rebound into account. In the end, measured SAG is what counts.