Trek Rail+: suspension setup & specs
The Trek Rail+ is an e-enduro bike with 160 mm of fork travel and 160 mm at the rear. It is powered by Bosch. This page lists the 5 current builds with fork, shock and shock size and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Trek Rail+ →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Shock | Shock size | Rear travel | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|---|
| 5 Gen 5 | RockShox Psylo Gold RC (160 mm) | RockShox Deluxe Select+ RT | – | 160 mm | Bosch | – | €4,999 | Setup → |
| 8 Gen 5 | RockShox ZEB Select (160 mm) | RockShox Super Deluxe Select RT | – | 160 mm | Bosch | – | €5,499 | Setup → |
| 9.7 Gen 5 | RockShox ZEB Select (160 mm) | RockShox Super Deluxe Select RT | – | 160 mm | Bosch | – | €5,999 | Setup → |
| 9.8 Gen 5 | Check manually (160 mm) | FOX Float X Factory | – | 160 mm | Bosch | – | €6,999 | Setup → |
| 9.8 GX AXS T-Type Gen 5 | FOX 38 Performance Elite (160 mm) | FOX Float X Performance Elite | – | 160 mm | Bosch | – | €7,499 | Setup → |
How it compares
With 160 mm of fork travel, the Trek Rail+ is on the shorter side; the median of the 56 comparable bikes in the “e-enduro bike” category is 170 mm. Travel is the same front and rear at 160 mm each. Within Trek’s e-mountain bikes, it sits between the Trek Fuel+ EX and the Trek Fuel+ MX on travel. Depending on the build, the frame is aluminium or carbon.
Prices for the Trek Rail+ start at €4,999 (5 Gen 5), below the category median of €6,900. For the 9.8 GX AXS T-Type Gen 5 build, Trek asks €7,499. Depending on the build, fork and shock come from FOX and RockShox. The fork line-up ranges from the RockShox Psylo Gold RC to the FOX 38 Performance Elite. Drive comes from Bosch.
Setup notes for this spec
- Air fork (RockShox Psylo Gold RC): 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 FOX and RockShox adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Shock (RockShox Deluxe Select+ RT): 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.
- e-MTB: the extra weight mainly affects tyre pressure, which is why the table below already includes a surcharge. SAG is measured just as on a bike without a motor.
Target SAG for the Trek Rail+
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.
160 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 27 mm |
| Trail | 20 % = 32 mm |
| Enduro / rough | 22 % = 35 mm |
| Bike park | 20 % = 32 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
Basis: 2.60″ tyre width, tubeless, trail casing, including the e-MTB surcharge. If you run tubes, add about 0.2 bar (2.9 psi); with an insert, about 0.1 bar (1.5 psi) less is enough.
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.40 bar (20 psi) | 1.60 bar (23 psi) |
| 70 kg | 1.52 bar (22 psi) | 1.72 bar (25 psi) |
| 80 kg | 1.64 bar (24 psi) | 1.84 bar (27 psi) |
| 90 kg | 1.76 bar (26 psi) | 1.96 bar (28 psi) |
| 100 kg | 1.88 bar (27 psi) | 2.08 bar (30 psi) |
| 110 kg | 2.00 bar (29 psi) | 2.20 bar (32 psi) |
| 120 kg | 2.12 bar (31 psi) | 2.32 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.