CZJB MOTOR manufacturer produce differernt kinds 250w and 350w geared hub motor.This kit is regular multispeed rear geared cassette waterproof e-bike conversion kit,dropout is 138mm.With torque sensor,save power and elelctricity,CZJB independent research and development torque sensor.Let you riding easy.

Model:CZJB-90T2

Controller:sinewave 36V/48V 15A

Display:LCD display optional