Trek Slash: suspension setup & specs
The Trek Slash is an enduro bike with 170 mm of fork travel and 170 mm at the rear. This page lists the 4 current builds with fork, shock and shock size and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Trek Slash →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Shock | Shock size | Rear travel | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|
| 8 Gen 6 | FOX 36 Rhythm (170 mm) | FOX Float X Performance | – | 170 mm | – | €3,999 | Setup → |
| 9 GX AXS T-Type Gen 6 | RockShox ZEB Select+ (170 mm) | RockShox Vivid Select+ | – | 170 mm | – | €4,999 | Setup → |
| 9.8 XT Di2 Gen 6 | RockShox ZEB Select+ (170 mm) | RockShox Vivid Select+ | – | 170 mm | – | €6,499 | Setup → |
| 9.9 X0 AXS T-Type Gen 6 | RockShox ZEB Ultimate (170 mm) | RockShox Vivid Ultimate | – | 170 mm | – | €8,999 | Setup → |
How it compares
170 mm at the fork almost exactly matches the 170 mm median of the 41 bikes in the “enduro bike” category in our database. Travel is the same front and rear at 170 mm each. No other Trek model among its mountain bikes has more travel up front. The frame is available in aluminium or carbon.
Entry costs €3,999 for the 8 Gen 6 build – less than the category median of €4,750. The top build, 9.9 X0 AXS T-Type Gen 6, costs €8,999. Depending on the build, fork and shock come from FOX and RockShox. In total, 3 different forks are used, from the FOX 36 Rhythm to the RockShox ZEB Ultimate.
Setup notes for this spec
- Fork (FOX 36 Rhythm): 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 FOX and RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Air shock (FOX Float X Performance): measure SAG in your riding position, ideally with a helper holding the bike. Cycle the shock a few times after every pressure change.
Target SAG for the Trek Slash
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 Trek specifies its own target SAG for your model, that takes priority.
170 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 29 mm |
| Trail | 20 % = 34 mm |
| Enduro / rough | 22 % = 37 mm |
| Bike park | 20 % = 34 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 and shock
You will find a suitable starting pressure on the sticker on the fork stanchion (or on the shock) or in the suspension manufacturers’ setup charts. Our calculator gives you a starting value including rebound for your weight and riding style. What matters afterwards is the measured SAG from the table above.