Specification Motor Voltage:72V Motor Model: MOTOR BM1109 Material: Aluminum, Copper, Rubber Motor Type: High-speed BLDC Brushless Motor Motor Output: 3000W Motor Rated Speed: 4900r/min 6600RPM (MAX) Motor Diameter: 107mm/4.21in Distance between Two Motor Screw Holes: 9.5cm/3.74in Motor Rated Torque: 5.44N. M Motor Application Chain: T8F Sprockt / Chain Controller Power: 3000w Controller Voltage: 60-72V DC Controller Current: 80A Controller Mosfet: 24WF Controller Turn Under Voltage: 0.8-4.2V Brake Potential: High Level Brake/Low Level Brake Kit Weight: About 8kg/17.63lbs.