Upgrade your bicycle with our 48V 1000W Electric Bike Rear Wheel Conversion Motor Kit. Experience a max speed of 28mph and with dual-mode controller enables motors to operate with and without the Hall effect. Perfect for long-distance journeys, enjoy the convenience of effortless travel. High Quality: Electric bicycle rear wheel conversion kit with brushless & gearless hub motor fits for 20" bike Dual mode controller makes motor work under Hall effect and non-Hall effect for extending bike life Pedal assist system for sensing pedal cadence and allowing you to ride electric bike comfortably Aluminum alloy frame for durability and stability, can support a heavy weight up to 330 Lbs Brake levers cut off the power and brake when riding; CE certificated for quality & safety assurance Product Details: Overall Dimension(Dia.xW): 16 9/16" x 8 7/16" Compatible Tire Size: 20" x 4" Rim Diameter: 16 9/16" Hub Length: 9 7/16" Rear Dropout Spacing: 6 11/16" Motor Diameter: 9 1/2" Spokes Length: 2 13/16" Spoke Screw Type: 12G Controller Power: 1000W Controller Voltage: 48V Motor Speed: 510 RPM Also In The Box: 1x Motor Wheel 1x Controller 2x Brakes 2x Throttle Sleeves 2x Twist Throttles 1x LCD Display 1x PAS Sensor 1 Set of Flywheel 1 Set of Torque Arm 10x Wire Ties 1x Spoke Adjuster Notice: Battery, charger and tire are not included, please prepare them before using. The electric wheel is only applicable to conventional bicycles, not for tricycles, tractors, etc. Please go to automobile repair shops with standard business license for modification.