Wheel Hub: Effectively improve the edge of the wheel hub, which is light and high end, comfortable, and has a strong bearing capacity. It realizes noise operation and allows you to fully enjoy the riding pleasure. Controller Shell: The controller shell is made of metal, with slot design, good heat dissipation, to avoid thermal overload of the internal circuit. Plastic Display: The display is made of ABS plastic material, lightweight, strong and durable, fine workmanship, good toughness, good waterproof performance, provide better protection for the internal circuit and make it more durable. Multifunction Display: While riding the bike, the display will display many useful data on your bike, such as switch buttons, light switches, battery level display and other functions, you can always grasp the situation. Application Model: The 48V 250W electric wheel kit is suitable for electric bikes, DIY electric bikes, electric scooters, folding bikes, etc. Easy maintenance, high efficiency, greatly improve riding fun, suitable for cyclists who like a challenge. Item Type: Electric Bike Rear Wheel Conversion Kit Product Material: Stainless Steel, Aluminum Alloy, ABS Plastic, Metal Color: As Pictures Shown Weight: Approx. 6650g / 14.7in Motor Wheel Type: Rear Rotating Flywheel Brushless Motor Rated Voltage: 48V Rated Power: 250W Rated Speed: 25-28km/h Motor Speed: 207-270RPM Motor Torque N. M Motor Opening Size (mm): 135-142mm Motor Brake Type: V Brake, Disc Brake Motor Wheel Position: Rear Wheel Motor Torque Arm: M12 Motor Magnet Height: 24H Motor Magnet Pole Number: 20 Motor Operating Temperature: Minus 20 Degree-45 Degree Waterproof Grade: IP65 Controller Connector Type: Ordinary Connector (Except Motor Waterproof Connector) Controller Rated Voltage: DC 36V, 48V Controller Rated Current: 7A Controller Maximum Current: 15±1A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller Low Voltage Protection: DC 30, 40±0.5V. 1 x Motor Wheel. 5 x Cable Tie. 1 x Line Protection Cover. 1 x Control Box. 2 x Control Box Accessories. 1 x Throttle Dial. 1 x Power Assist Sensor Wiring. 2 x Brake Handle (Wire Included). We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.