Experience the power of the Bafang G020 48V 500W electric bike, featuring a Rear Disc brake system for superior control and stability on various terrains. High Efficiency? 75%. Enjoy an energy-efficient ride with an efficiency rate of 75% or higher, ensuring longer battery life and reduced energy consumption. Choose between 26″, 27.5″ and 700C wheel sizes for a customized riding experience that suits your preferences and riding conditions. Advanced Disc Brake System. The reliable disc brake system ensures quick and safe stopping power, enhancing your control and safety on the road. 48V500W Rear Hub Motor Disc Brake Specification. Motor Model: RM G020.500W. DC Type Brake Mode: Disc brake Wheel Size (Inch): 26″, 27.5″ Or 700C Rated Voltage (DCV): 48V Rated Power (W): 500W Controller Current: 18A Max Speed: 40KM/H (26) Max Torque: 65 N. M Efficiency (%)? 75 Noise Grade (dB). Your understanding is appreciated. Note: The rear hub motor kit is designed to fit rear dropout size with 135-142mm, suitable for 1.5″-2.4″ Tyre. Choosing Brake Levers or Sensors. We send the brake levers default. The kit is compatible with or without brake sensors. For standard cable actuated brakes, select brake levers. For adapting existing brakes, especially hydraulic ones, magnet sensors are available. Additional costs may apply for remote area deliveries. Local return addresses will be provided for convenience. Your satisfaction is our priority. We appreciate your 5-star feedback and are here to assist you with any issues.