Rotwild R.EX: suspension setup & specs
The Rotwild R.EX is an e-MTB for trail and touring with 160 mm of fork travel and 150 mm at the rear. It is powered by Shimano EP801. 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 Rotwild R.EX →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, motor, weight and price according to the manufacturer. Wheel size: MX.
| Build | Fork | Shock | Shock size | Rear travel | Motor | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|---|
| CORE | FOX 36 Float Performance (160 mm) | FOX Float X Performance | 185x55 | 150 mm | Shimano EP801 820 Wh | 22.0 kg | €6,990 | Setup → |
| ULTRA | FOX 36 Float Factory (160 mm) | FOX Float X Factory | 185x55 | 150 mm | Shimano EP801 820 Wh | 21.4 kg | €11,490 | Setup → |
How it compares
Up front the Rotwild R.EX runs 160 mm – 10 mm more than the 150 mm median we calculated from 101 bikes in the “e-MTB for trail and touring” category. The rear offers 150 mm, 10 mm less than the front. Within Rotwild’s e-mountain bikes, it sits between the Rotwild R.X750 and the Rotwild R.EXC on travel. The frame is made of carbon.
The lightest build, ULTRA, weighs 21.4 kg according to Rotwild – about 2.0 kg less than the category median (23.4 kg across 49 bikes with a stated weight). There are 0.6 kg between the lightest and the heaviest build. With a starting price of €6,990 (CORE), the Rotwild R.EX is above the category median (€5,500). The top build, ULTRA, costs €11,490. Fork and shock come from FOX on every build. In total, 2 different forks are used, from the FOX 36 Float Performance to the FOX 36 Float Factory. It is powered by Shimano EP801 with a 820 Wh battery. Worth knowing for heavier riders: the maximum system weight is 130 kg – after about 22 kg of bike, that leaves around 108 kg including kit.
Setup notes for this spec
- Fork (FOX 36 Float Performance): 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 adjuster fully closed first and count clicks from there – that way you can note settings and restore them later.
- Shock (FOX Float X Performance): 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: because of the extra weight, start with slightly more tyre pressure – the surcharge is already built into the table below.
Target SAG for the Rotwild R.EX
Instead of percentages, this table gives SAG directly in millimetres, measurable with the O-ring on the stanchion and on the shock shaft. Change the pressure step by step until you reach the value; if Rotwild gives its own target SAG, use that.
160 mm fork, 55.0 mm shock stroke (all builds)
| Riding style | Fork SAG | Shock SAG |
|---|---|---|
| XC / touring | 17 % = 27 mm | 24 % = 13.2 mm on the shock shaft |
| Trail | 20 % = 32 mm | 28 % = 15.4 mm on the shock shaft |
| Enduro / rough | 22 % = 35 mm | 30 % = 16.5 mm on the shock shaft |
| Bike park | 20 % = 32 mm | 27 % = 14.9 mm on the shock shaft |
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. Stock tyres: SCHWALBE Albert Evo / SCHWALBE Albert Evo.
| 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 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.