Material: Made of high quality aluminum, copper and ABS, reliable performance, durable and long service life. Noise Free: Brushless hub motor realizes noise free operation, allowing you to fully enjoy the fun of riding. High Efficiency: High strength and efficiency, which greatly improves the fun of riding, suitable for cyclists who like challenges. Equipment: 5 spoke sizes are selectable, easy to operate, and equipped with a display instrument to display data. Application: This motor is suitable for DIY electric bicycles, making your ordinary bicycles become electric bicycles. Motor: Speed 25-28km/h, rotate speed 207-270Rpm, torque 29-31.2 N. M, matching controller15A, gear motor structure. Controller: Maximum current 15±1A, rated voltage DC36V/48V, speed setting 1-4.2V, rated current 7A, low voltage protection DC30/40±0.5V. Item Type: Electric Bicycle Conversion Kit Material: Aluminum + Copper + ABS Color: As Pictures Shown Connection Method: Waterproof Connector Motor: Speed: 25-28km/h Rotate Speed: 207-270Rpm Torque: 29-31.2 N. Open Size(mm): Rear Motor: Approx. Matching Controller: 15A Wheel Rim: P19D Moment Arm: M14 Disc Brake: Approx. 160mm/6.3in Motor Structure: Gear Motor Magnet Height: 22H Number of Magnet Poles: 20 Brake Type: V Brake/Disc Brake Universal Controller: Mose Tube: 6 Tubes Maximum Current: 15±1A Speed Setting: 1-4.2V Rated Current: 7A Brake Input: Low Level. 1 x Thumb Throttle. 1 x PAS Sensor. 1 x One for Two Extension Cord. 1 x Motor Extension Cable. 1 x Display Manual. 1 x Spoke Installation Tool. 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.