R.EX 900 2026
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.
All Mountain
The Rotwild R.EX 900 2026 is a German-built carbon enduro eMTB and Rotwild's range-first Avinox flagship. Headline numbers: 170mm fork, 160mm rear (frame notes describe 160 front / 150 rear, indicative of conservative travel positioning), DJI Avinox M1 at 105Nm and a 1000W peak with a 2.52kg motor mass, a removable 864Wh battery, 22.4kg claimed, 64.0 degree head angle and reach 462 to 512mm across M, L and XL. Trim ladder: base at GBP 11,999 and ULTRA at EUR 12,490 (22.1kg). With no curated community quotes on file yet, this verdict draws on the gold spec and the well-established DJI Avinox platform behaviour. Rotwild has a long heritage in premium German eMTB engineering with a small but devoted following.
Drive system and range. The DJI Avinox M1 is the most powerful production motor in its tier in 2025: 105Nm of torque, 1000W peak and a 2.52kg motor mass. Avinox can sustain peak torque longer than rival full-power motors thanks to large gearbox surface area and aggressive thermal mapping. Rotwild has fitted a notably large 864Wh battery: bigger than the standard Avinox FP800: making the R.EX 900 a deliberate range-first build. The battery is removable. Real-world range with 864Wh on a 160/170mm rig is genuinely capable of 2,000m+ of vertical in a single charge for typical riders, well into all-day backcountry territory. Avinox's app ecosystem, anti-theft alarm, 4G/GPS and over-the-air firmware updates come built in.
Geometry and handling. 64.0 degrees up front is bang on the modern enduro norm. Reach steps cleanly: 462 (M), 487 (L), 512 (XL). Chainstays are a uniform 439mm and wheelbase tops out at 1303mm on XL. The polydynamic carbon frame uses mid-high pivot kinematics with a mullet wheel concept (29 front, 27.5 rear), modular dropouts and an Acros RW EXC angle-adjustable headset: all genuine engineering depth from Rotwild. Three sizes is on the conservative side; riders under 1.70m or over 1.95m should fit-check.
Build and value. Two trims. Base (GBP 11,999, 22.4kg) gets a FOX 36 Float Performance fork (160mm, GRIP damper), FOX Float X Performance shock (185x55mm), MAGURA MT5 HC-W four-piston brakes and Shimano XT M8100 1x12 mechanical. ULTRA (EUR 12,490, 22.1kg) is the higher-tier build. Standout: 864Wh removable battery on a 22.4kg carbon enduro rig is class-leading for range-per-weight. Questionable: GBP 11,999 base pricing puts it firmly in YT Decoy Carbon Pro and Specialized Kenevo Pro territory, where carbon AXS Transmission and Maven brakes are standard.
Caveats and known gripes.
- Premium pricing. GBP 11,999 base is a serious ask: rivals with similar Avinox M1 power and 800Wh batteries from Amflow, Crussis or Olympia start meaningfully cheaper.
- Three sizes only. M (462mm reach), L (487mm) and XL (512mm) only: no S, riders under 1.70m should look elsewhere.
- Mechanical drivetrain at the base trim. Shimano XT M8100 mechanical on a sub-23kg Avinox carbon enduro flagship is conservative; AXS Transmission is standard on most competitors at this price.
- No curated community signal yet. The R.EX 900 has no owner reporting on the eMTB Forums community at the point of writing; long-term motor and frame reliability data is yet to mature.
- Limited UK dealer network. Rotwild is well-distributed in Germany and Austria but thinner elsewhere; warranty routing requires planning.
- Mullet only. Wheel configuration is fixed at 29 front, 27.5 rear; full 29in or full 27.5in are not options out of the box.
Verdict. The R.EX 900 is the range king of the Avinox carbon enduro segment in 2026, with proper 170/160mm travel, an 864Wh removable battery, 22.4kg system weight and Rotwild's polydynamic carbon engineering. It suits riders who prioritise range and German-engineering pedigree, who fit M, L or XL, and who can support Rotwild's central European service network. Buyers chasing AXS Transmission and Maven brakes at the base trim, smaller sizes or a more cost-effective entry into Avinox M1 power should look at Crussis E-Full 12, Amflow PL Carbon or Commencal Meta Power. Production status: current.
Frame
Polydynamic carbon frame handcrafted from high-modulus carbon fibres with mid-high pivot kinematics, mullet wheel concept (29 in front / 27.5 in rear), modular dropouts and Acros RW EXC angle-adjustable headset, 160 mm front / 150 mm rear travel
Geometry · hover a row to highlight the measurement on the bike
| M | L | XL | |
|---|---|---|---|
| Toptube | 596 mm | 621 mm | 648 mm |
| Reach | 462 mm | 487 mm | 512 mm |
| Stack | 638 mm | 642 mm | 651 mm |
| Seattube | 445 mm | 475 mm | 511 mm |
| Chainstay | 439 mm | 439 mm | 439 mm |
| Headtube Angle | 64° | 64° | 64° |
| Seattube Angle (eff) | 78° | 78° | 78° |
| BB Drop | 28 mm | 28 mm | 28 mm |
| Wheelbase | 1246 mm | 1273 mm | 1303 mm |
| Headtube | 110 mm | 115 mm | 120 mm |
| Standover | 735 mm | 733 mm | 732 mm |
| Front Centre | 807 mm | 834 mm | 864 mm |
Trims · 4
Core £7,800 | Pro £8,670 | Ultra £10,840 | ULTRA | |
|---|---|---|---|---|
| Motor | Avinox M1 · 150 Nm · all trims | |||
| Battery | Rotwild 864Wh · 864 Wh · all trims | |||
| Travel F/R | 160/150 mm · all trims | |||
| Frame | Carbon · all trims | |||
| Fork | Fox 36 Float Performance 160mm GRIP 2-Pos | RockShox Lyrik Select+ 160mm CHARGER 3.1 | Fox 36 Float Factory Kashima 160mm GRIP X HSC/LSC | FOX 36 Float Factory Kashima, 160 mm |
| Shock | Fox Float X Performance 185x55 2-Pos | RockShox Super Deluxe Select+ 185x55 3P | Fox Float X Factory Kashima 185x55 2-Pos | FOX Float X Factory Kashima, 185 x 55 mm |
| Headset | ACROS RW EXC 1.5 - MOD · all trims | |||
| Stem | e*thirteen Plus 35, 50 mm | ROTWILD S120, 35 mm | ROTWILD S120, 35 mm | ROTWILD S120, 35 mm |
| Handlebar | e*thirteen Plus, 20 mm rise / 780 mm width | ROTWILD B280, 15 mm rise / 780 mm width | ROTWILD B220 Carbon, 15 mm rise / 780 mm width | ROTWILD B220 Carbon, 15 mm rise / 780 mm width |
| Grips | ERGON GD10 · all trims | |||
| Saddle | ERGON SM Sport | ERGON SM Sport | ERGON SM Pro | ERGON SM Pro |
| Seatpost | 8PINS NGS2.0 integrated dropper, 192-228 mm | 8PINS NGS2.0 integrated dropper, 192 mm (M) / 210 mm (L) / 228 mm (XL) | 8PINS NGS2.0 integrated dropper, 192-228 mm | 8PINS NGS2.0 integrated dropper, 192-228 mm |
| Brakes | Magura MT5 (203/203mm) | SRAM Maven Bronze (200mm) | SRAM Maven Silver (200mm) | SRAM Maven Silver, 200 mm rotors |
| Rear derailleur | SHIMANO XT M8100 SGS Hyperglide+ | SRAM GX Eagle Transmission AXS | SRAM X0 Eagle Transmission AXS | SRAM X0 Eagle Transmission AXS |
| Crank | e*thirteen Plus, 165 mm (M/L) / 170 mm (XL) | e*thirteen Plus, 165 mm (M/L) / 170 mm (XL) | e*thirteen Race Carbon, 165 mm (M/L) / 170 mm (XL) | e*thirteen Race Carbon, 165 mm (M/L) / 170 mm (XL) |
| Shifters | SHIMANO XT M8100 I-Spec EV | SRAM AXS Pod Controller | SRAM AXS Pod Controller | SRAM AXS Pod Controller |
| Cassette | SHIMANO CS-6100, 10-51T, 12-speed | SRAM GX Eagle XS-1270, 10-52T, 12-speed | SRAM GX Eagle XS-1275, 10-52T, 12-speed | SRAM GX Eagle XS-1275, 10-52T, 12-speed |
| Chain | SHIMANO HG 7100, 12-speed | SRAM GX Eagle Transmission, 12-speed | SRAM X0 Eagle Transmission, 12-speed | SRAM X0 Eagle Transmission, 12-speed |
| Drivetrain | Shimano XT 8100 12sp | SRAM GX Eagle AXS 12sp | SRAM X0 Eagle AXS 12sp | SRAM X0 Eagle Transmission AXS; e*thirteen Race Carbon, 165 mm (M/L) / 170 mm (XL); SRAM AXS Pod Controller; SRAM GX Eagle XS-1275, 10-52T, 12-speed; SRAM X0 Eagle Transmission, 12-speed |
| Wheels | Crankbrothers Synthesis Enduro | Crankbrothers Synthesis Enduro | Crankbrothers Synthesis Enduro Carbon | CRANKBROTHERS Synthesis Enduro Carbon, mullet (29 in front / 27.5 in rear) |
| Tyres | Schwalbe Albert Evo Trail 29x2.5 / 27.5x2.5 | Schwalbe Albert Evo Trail 29x2.5 / 27.5x2.5 | Schwalbe Albert Evo Trail 29x2.5 / 27.5x2.5 | SCHWALBE Albert Evo 29x2.5 front / 27.5x2.5 rear |
| Weight | 22.8 kg | 22.6 kg | 22 kg | 22.1 kg |
| Price | £7,800 | £8,670 | £10,840 | — |
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