E-Bike Converter

OZO Electric Donkey 250W Frontrad-Kit 20" mit Rahmenakku 36 V

French 250 W front-hub kit for 20 inch wheels (folding and cargo bikes) with frame battery, display and a 2 year warranty.

  • Front hub motor
  • approx. €929 (as of 2026-11-09, no guarantee) (battery included)
  • Not tested by us yet

Key data

Rated power250 W
Torque55 Nm
Voltage36 V
SensorCadence
Battery in setYes
Weightunknown
Wheel sizes (ETRTO)406
Front hub spacingunknown
Axlesunknown
Battery sizes250 Wh / 360 Wh / 500 Wh / 720 Wh
Battery positionsDown tube, Bottle cage
ThrottleOptional
Pedelec-conformYes, if set up correctly
EU retailer/supportYes

Fits / does not fit

Fits

  • Wheel sizes 406

Does not fit

  • Wheel sizes 622, 635, 584, 559, 507, 451

Unclear, please check

  • Front hub spacing
  • Axles
  • Disc brake
  • Rim brake

What is in the box

  • Donkey-Frontmotor in 20"-Mach1-Doppelkammerfelge eingespeicht
  • Controller 36 V / 15 A, in der Akkuhalterung integriert
  • Display (Bafang-Protokoll)
  • Pedalsensor
  • Kabelbaum und Motorverlängerung
  • Ladegerät
  • Akku (gewählte Option)
  • Montagepaket

Required accessories not included

Not part of the set, but needed:

  • Torque arm

Offers

Retailer prices, see date. Partner links are marked.

  • View at OZO Electric · 20", Rahmenakku 250 Wh (Aktionspreis, Liste 954 EUR) · approx. 929 € (as of 2026-11-09)

Pros / Cons

Pros

  • The maker states 55 Nm, EN 15194 approval for 250 W and 25 km/h, and a 2 year warranty.
  • The maker offers batteries from 250 to 720 Wh.

Cons

  • The product details list 35 km/h top speed, so check the setting.
  • Spacing, axle and brake compatibility are not on the page and no throttle is included.

Sources