... drivemotorfront/rear motor option,Diameter 108mm, 2 kg, 36V 350W,with sensor, disc brake optionUS$79.00Spokesand rimdouble-wall aluminium rim ... ,20-28''option with 13g spokesUS$20.00Controller9 MOSFETs,for both 36V/48V,350W ... electric wheel hub motor conversion kit for e-bike e-scooter