RotwildR.EX Ultra
- Motor
- DJI Avinox M2S150 Nm; 1,300 W peak
- Battery
- 864 WhIPU900 Carbon, Push+ quick release
- Travel F / R
- 160 / 150 mm
- Wheels
- Mullet 29" / 27.5"
- Frame
- Carbon
- Weight
- 22 kgManufacturer figure (size M)
Overview
The Rotwild R.EX Ultra (€12,490) is the top build of the R.EX: DJI Avinox M2S (150 Nm) with 864 Wh, FOX 38 Float Factory Kashima fork, FOX Float X Factory Kashima shock, SRAM X0 Eagle Transmission AXS and SRAM Maven Silver brakes. Claimed weight is 22.0 kg.
The R.EX is Rotwild's carbon all-mountain e-MTB, derived from the R.EXC race enduro with slightly adapted geometry. For model year 2027 it uses the DJI Avinox drive with Rotwild's own IPU900 battery (864 Wh, Push+ quick release): the Avinox M2S (150 Nm, 1,300 W) on Pro and Ultra, the Avinox M2 (125 Nm, 1,100 W) on the Core.
It runs mixed wheels (29-inch front, 27.5-inch rear) with a 160 mm fork and 150 mm of rear travel from a mid-high pivot rear end in Rotwild's Elevated Box Design. It comes in M, L and XL; Rotwild quotes 22.0 kg for the Ultra.
- DJI Avinox M2S (150 Nm) or M2
- 864 Wh IPU900 battery, Push+ quick release
- 160 / 150 mm, mid-high pivot
- Mullet wheels, carbon frame
Gallery
Photos: Rotwild
Full specifications
Frame & suspension
- Sizes
- M, L, XL
- Frame
- Polydynamic Carbon
- Rear shock
- FOX Float X Factory Kashima, 185 x 55 mm / 2-Pos Adjust
- Headset
- ACROS RW EXC 1.5 - MOD, 0° / mod56/56
- Fork
- FOX 38 Float Factory Kashima, 160 mm / Grip X / HSC/LSC / LSR
- Colour
- Bloodfin red
- Max. system weight
- ASTM4 - 130 kg
E-system
- Display
- AVINOX 2" OLED
- Motor
- AVINOX M2.S, max. 150 Nm / 1300 W
- Battery
- IPU900 Carbon - Push+, 864 Wh / 36 V / 21.700 Cell / 3.580 g / QR-Button
- Charger
- ROTWILD - 7 A High Power
Drivetrain
- Crankset
- e*thirteen Race Carbon, 160 mm (M) / 165 mm ( L/XL)
- Chainring
- e*thirteen Spider / SRAM Chainring 34 T.
- Chain guide
- ROTWILD EXC Chainguide
- Shifter
- SRAM AXS Pod
- Rear derailleur
- SRAM X0 Eagle Transmission AXS
- Chain
- SRAM X0 Eagle Transmission
- Cassette
- SRAM X0 Eagle XS 1275, 10-52 T. / 12-Speed
Brakes
- Front brake
- SRAM Maven Silver
- Front rotor
- SRAM HS2 / 200 mm
- Rear brake
- SRAM Maven Silver
- Rear rotor
- SRAM HS2 / 200 mm
Wheels & tyres
- Front Wheel
- NEWMEN Phase Carbon, 30 mm Width / 110-15 mm / 6-Bolt
- Rear Wheel
- NEWMEN Phase Carbon, 30 mm Width / 148-12 mm / 6-Bolt
- Front tyre
- SCHWALBE Magic Mary Radial, Trail Pro / Ultra Soft / TLR / 29x2.5
- Rear tyre
- SCHWALBE Magic Mary Radial, Trail Pro / Soft / TLR / 27.5x2.5
Cockpit
- Handlebar
- ROTWILD B220 Carbon, 35 mm Rise / 780 mm Width
- Stem
- ROTWILD S120, 35 mm Length
- Seatpost
- 8PINS NGS3.0, up to 225 mm (XL)
- Saddle
- ERGON SM Pro
- Grips
- ERGON GDH TEAM, Slim Factory Frozen
Other
- Weight
- 22.0 kg (size M)
Manufacturer specification — source. Specs and prices can change; check with the brand or your dealer.
R.EX geometry
| Size | M | L | XL |
|---|---|---|---|
| ASeat Tube Length | 445 mm | 475 mm | 511 mm |
| BTop Tube Length | 596 mm | 621 mm | 648 mm |
| CHead Tube Length | 110 mm | 115 mm | 125 mm |
| DChain Stay Length | 439 mm | 439 mm | 439 mm |
| EBB Height | 337 mm | 337 mm | 337 mm |
| FBB Drop | 28 mm | 28 mm | 28 mm |
| GHead Tube Angle | 64° | 64° | 64° |
| HSeat Tube Angle | 78° | 78° | 78° |
| IReach | 462 mm | 487 mm | 512 mm |
| JStack | 638 mm | 642 mm | 651 mm |
| KWheel Base | 1246 mm | 1273 mm | 1303 mm |
| LStandover | 735 mm | 733 mm | 732 mm |
Source: Rotwild.
R.EX: builds compared
R.EX range →| R.EX Core | R.EX Pro | R.EX Ultra | |
|---|---|---|---|
| Price | €8,990 | €9,990 | €12,490 |
| Frame | Carbon | Carbon | Carbon |
| Fork | FOX 38 Float Rhythm, 160 mm / Grip / Sweep Adjust | FOX 38 Float Performance, 160 mm / Grip / Sweep Adjust | FOX 38 Float Factory Kashima, 160 mm / Grip X / HSC/LSC / LSR |
| Shock | FOX Float X Performance | FOX Float X Performance | FOX Float X Factory Kashima |
| Derailleur | SRAM EAGLE90 | SRAM GX Eagle Transmission AXS | SRAM X0 Eagle Transmission AXS |
| Brakes | SRAM Maven | SRAM Maven Bronze | SRAM Maven Silver |
| Wheels | NEWMEN Beskar | NEWMEN Beskar | NEWMEN Phase Carbon |
| Display | AVINOX 2" OLED | AVINOX 2" OLED | AVINOX 2" OLED |
| Weight | 23.2 kg | 22.6 kg | 22 kg |
R.EX Ultra: FAQ
How much does the Rotwild R.EX Ultra cost?
€12,490 (MSRP Germany, VAT incl.). The R.EX range runs from €8,990 (R.EX Core) to €12,490 (R.EX Ultra). Prices vary by country and dealer.
How much does the Rotwild R.EX Ultra weigh?
Rotwild quotes 22 kg. It is the lightest build of the R.EX.
What motor and battery does the Rotwild R.EX Ultra have?
DJI Avinox M2S (150 Nm; 1,300 W peak). 864 Wh battery — iPU900 Carbon, Push+ quick release.
How much suspension travel does the Rotwild R.EX Ultra have?
160 mm at the fork and 150 mm at the rear, on mullet 29" / 27.5" wheels.
What sizes does the Rotwild R.EX Ultra come in?
M, L, XL. Check the geometry table to compare reach and stack between sizes.
What is the difference between the R.EX Ultra and the R.EX Pro?
They share the R.EX frame platform and motor; the differences are in the parts — fork: FOX 38 Float Factory Kashima vs FOX 38 Float Performance; shock: FOX Float X Factory Kashima vs FOX Float X Performance; derailleur: SRAM X0 Eagle Transmission AXS vs SRAM GX Eagle Transmission AXS; brakes: SRAM Maven Silver vs SRAM Maven Bronze; claimed weight: 22 kg vs 22.6 kg; price: €12,490 vs €9,990.
