Test result
| Property | Grade |
|---|---|
| Riding behavior | 2,6 |
| Lab | 1,6 |
| Equipment | 2,3 |
| Motor | 1,1 |
| Final grade | 2,3 |
You can find the full bike rating here
Data and facts about the Rotwild R.EX 900 Pro
| Suspension travel | 160 mm |
| Weight | 22.91 kg |
| Motor | DJI Avinox M 1.24 |
| Battery | IPU 900 Carbon-Push+ |
| Fork | Rock Shox Lyrik Select+ |
| Rear shock | Rock Shox Super DeLuxe Select+ |
| Drivetrain | SRAM GX Eagle Transmission |
| Front brake | SRAM Maven Bronze |
When it comes to innovative e-bikes, Rotwild has been way ahead of the game for years. The bike manufacturer from Dieburg in Hesse was one of the very first brands to consistently switch to e-bikes and is always coming up with something awesome. Red Deer was at the forefront with the Pinion MGU and Broses S Mag. In 2020, the R.X 375 was the first light bike with full engine power - a current trend right now. And now the R.EX with DJI drive and exchangeable battery is being launched.
This test is part of a large comparison of 7 high-end E-All-Mountains. Here are the other bikes & articles:
- >> Cannondale Moterra 1: Test winner - the best E-MTB 2026!
- >> Canyon Spectral:On CFR on test: Price tip for E-MTB with dream equipment
- >>Crussis e-Full 12.11 Pro test: fun ride with DJI Avinox
- >> Rotwild R.EX Pro: The best bike with DJI Avinox?
- >> Santa Cruz Vala 90: Downhill specialist with all-round qualities?
- >> Stevens E-Inception AM 8.8.1 GTF: Test winner e-bike relaunched
- >> Transition Regulator CX in the test: short range, lots of riding fun
The facts about the Rotwild R.EX Pro
- Motor: DJI Avinox, 120 Nm max. torque
- Battery: 864 Wh (removable)
- Frame material: Carbon
- Spring travel: 160/150 mm
- Wheel size: 29/27.5 inch (Mullet)
- Frame sizes: M - XL
- Price: 9990 Euro
- Weight: 22.9 kg (test bike in size L, BIKE measurement)
- Max. system weight: 130 kg
- Guarantee: 5 years
DJI with removable battery for the first time
The battery itself we already know the basic features from Rotwild's 735 and R.EXC (here in the test). The BMZ battery with carbon outer casing has a nominal 864 watt hours at a real weight of 3.72 kilograms (BIKE measurement). That's really powerful for a battery of this size. We have also already tested the range of the Rotwild. The pre-series battery in our test bike is said to have slightly less capacity than the series battery. Nevertheless, in our standardised range test, the Rotwild already goes a little further than DJI bikes with 800 batteries.
Nominally, you end up with 1743 metres in altitude compared to around 1600 on the 800 DJI. The final range of the R.EX should therefore be excellent - roughly on a par with the 800 Bosch bikes. The simple removal of the battery with a push button is also pleasing. However, the mechanism must be properly adjusted so that the battery neither rattles nor is difficult to remove.
The DJI Avinox M1 motor itself impresses with up to 1000 watts of power and 120 Nm at less than 2.6 kilograms. The Rotwild comes with both control units for assistance and display views on the handlebars for maximum comfort. The top tube display is also touch-enabled and there's a great app with lots of features on top. More details about the jack-of-all-trades from DJI can be found here in the detailed test.
Upscale level: how the red deer is equipped
Our test bike from Rotwild's Pro series comes for almost 10,000 euros with functional equipment but without a lot of bling bling. Specifically, this means that the Lyrik fork and Superdeluxe shock from the Rockshox Select+ series offer extensive adjustability but not quite the top technology. The GX-Transmission wireless drivetrain, aluminium wheels from Crankbrothers and Maven bronze brakes are also fitted. This is consistently upper mid-range, but there are no real high-end parts. The fully integrated Eightpins dropper post has a maximum stroke of 185 millimetres.
The clear highlight, however, is the elegant Rotwild carbon frame. The geometry is characterised by short 440 mm chainstays, a low front end with flat handlebars and a long seat tube. The banana swing arm-style rear triangle has a high pivot point. As with the Enduro R.EXC, this should give the bike plenty of traction and smoothness.
On the trail: Rotwild pulls the suspension trump card
Yes, the price is high. But when it comes to the quartet facts, Rotwild with the DJI motor scores highly. But drive or not, an e-mountainbike should also shine when it comes to riding fun on the trail. Uphill, the Rotwild is slightly front-wheel orientated with a little pressure on the hands. In combination with the low handlebars, the handling remains controlled even with short chainstays and a lot of motor power. The bike doesn't start an unwanted wheelie too early.
Schwalbe's radial tyres and the active rear suspension offer plenty of traction. With the Avinox, a short kick in trail mode is enough to push the bike powerfully over obstacles on steep gradients. However, turbo mode is definitely too much of a good thing on uphill trails. With a longer rear end and even more pressure on the front, more would be possible here.
Long seat tube: wasted potential?
Downhill, the Rotwild presents a mixed picture. There was full praise for the sensitive and plush rear suspension of the R.EX. It irons out even large obstacles in an exemplary manner and provides a lot of comfort without decoupling the rider too much from the ground. The tyres and brakes are exemplary. The short chainstays give the Rotwild agile handling. In flat corners, you can put a lot of pressure on the front.
As soon as it gets steep, however, the Rotwild seems increasingly unbalanced. The long seat tube limits the freedom of movement at the rear. In combination with the low handlebars, this results in an unfavourable riding position on demanding downhills, comparable to a tele-post that is too short. Riders with short legs in particular are not well integrated into the bike. Playing with the trail, pulling the bike onto the rear wheel or pushing into corners at high speed is difficult. It's a shame, because with a higher front end and more freedom of movement at the rear, the Rotwild would definitely have the potential to be an exemplary trail machine.
BIKE review: Rotwild R.EX Pro
Strengths
- superior chassis
- Harmoniously selected equipment
- Range and exchangeable battery
Weaknesses
- long seat tube and low front
- High price
BIKE overall grade: 2.3
The BIKE grade is made up of the testers' practical impressions and laboratory measurements. The grade is independent of price. Grading spectrum analogue to the school grading system. We award a grade of 3.0 for a solid performance.
BIKE Conclusion on the Rotwild R.EX Pro
The Rotwild R.EX Pro gets top marks for its plush suspension. However, the geometry with a low front end and long seat tube unnecessarily restricts the trail fun for active riders. The bike shines on tour. The easily removable battery is a unique USP in the DJI cosmos. - Laurin Lehner, BIKE editor
Adrian Kaether
Editor
