ROTWILD - R.EX ULTRA

🏍️ ROTWILD R.EX ULTRA — 2026 Model Year

🔥 Top-tier Enduro e-MTB — FOX Factory Kashima front & rear, SRAM X0 Eagle Transmission AXS, and Crankbrothers carbon wheels
Built on a Polydynamic Carbon frame with the AVINOX M1.24 drive unit (105Nm / up to 1000W) and a removable 864Wh battery with QR quick-release.

📦 General Information

◦ Model: ROTWILD R.EX ULTRA (2026)
◦ Type: Enduro / All-Mountain Electric Mountain Bike (e-MTB)
◦ Frame: Polydynamic Carbon
◦ Approved Total Weight: ASTM4 — 130 kg

🦾 Frame & Suspension

◦ Frame: Polydynamic Carbon

◦ Front Fork: FOX 36 Float Factory (Kashima)
◦ Travel: 160 mm
◦ Damper: GRIP X
◦ Adjustments: HSC / LSC / LSR

◦ Rear Shock: FOX Float X Factory (Kashima)
◦ Size: 185 × 55 mm
◦ Adjustment: 2-position (2-Pos)

◦ Headset: ACROS RW EXC 1.5 – MOD
◦ Spec: 0° / mod56/56

⚡ Motor & Battery System

◦ Motor: AVINOX M1.24
◦ Torque: 105 Nm
◦ Max Power: Up to 1000 W

◦ Battery: IPU900 Carbon – Push+
◦ Capacity: 864 Wh
◦ Voltage: 36 V
◦ Cell Type: 21700
◦ Battery Weight: 3,580 g
◦ Removal System: QR Button (quick-release)

⚙️ Drivetrain

◦ Crankset: e*thirteen Race Carbon
◦ Crank Length: 165 mm (M/L) / 170 mm (XL)
◦ Chainring: e*thirteen Spider / SRAM Chainring 34T
◦ Chain Guide: ROTWILD EXC

◦ Shifter: SRAM AXS Pod
◦ Rear Derailleur: SRAM X0 Eagle Transmission AXS
◦ Chain: SRAM X0 Eagle Transmission (12-speed)
◦ Cassette: SRAM GX Eagle XS-1275 (12-speed) 10–52T

🛑 Braking System

◦ Front Brake: SRAM Maven Silver
◦ Front Rotor: SRAM HS2 200 mm
◦ Rear Brake: SRAM Maven Silver
◦ Rear Rotor: SRAM HS2 200 mm

🦿 Wheels & Tires

◦ Wheelset: Crankbrothers Synthesis Enduro Carbon

◦ Front Wheel: 31.5 mm internal / 110–15 mm / 6-bolt
◦ Rear Wheel: 29.5 mm internal / 148–12 mm / 6-bolt

◦ Front Tire: Schwalbe Albert Evo
◦ Spec: Trail / Soft / TLE / 29×2.5
◦ Rear Tire: Schwalbe Albert Evo
◦ Spec: Trail / Soft / TLE / 27.5×2.5

🧩 Cockpit

◦ Handlebar: ROTWILD B220 Carbon
◦ Rise: 15 mm
◦ Width: 780 mm

◦ Stem: ROTWILD S120
◦ Length: 35 mm

◦ Grips: Ergon GD10 Slim Factory Frozen

🪑 Seat & Seatpost

◦ Seatpost: 8PINS NGS2.0 (fully integrated in-frame)
◦ Travel: 192 mm (M) / 210 mm (L) / 228 mm (XL)
◦ Saddle: Ergon SM Pro

🔌 Accessories

◦ Charger: ROTWILD 7A High Power

💥 Key Highlights

◦ FOX Factory Kashima front & rear — highly tunable, extremely stable on descents
◦ AVINOX M1.24: 105Nm torque + up to 1000W max power
◦ 864Wh battery — quick-release QR button, only 3.58 kg
◦ SRAM X0 Eagle Transmission AXS + 10–52T for steep climbs
◦ SRAM Maven Silver + HS2 200 mm rotors — powerful braking at speed
◦ Crankbrothers carbon Enduro wheels — lighter, stiffer, built to charge hard