Specifications BrandTongsheng ModelTSDZ8Motor48V 750WChainring44TInstrumentEKD01 MeterMotor TypeMid Drive MotorMax Speed45KM HMax Torque120N mEfficiency≥85 WaterproofIPX5Motor Weight5 8kgOperating Temperature 20°C 45°CCompatible Bottom Bracket WidthBB 68 73mm Features 1 Fits 95 of standard bike frames with 68 73mm bottom bracket 2 lighter motor than others for almost the same power output 3 Built in torque and cadence sensor this results in much smoother acceleration than any cadence sensored mid motor 4 Easy to install Kit includes all installation hardware and tools 5 120Nm of torque is almost twice as much as a hub motor and can help you climb up any hill in your way Note Please kindly know that the Tongsheng motor is a Torque Sensor Type it only works when a person gets on the bike and turns it on The motor doesn t work if there is no load Package includes 1 x 48V 750W Motor1 x EKD01 Meter1 x Chain Wheel1 Set x Installation Kits1 x Manual