Brake Type: Disc Brake. Motor connector: Quick Release Waterproof Connector. Efficiency (%)? 82%. Packing List: 1 pc Rear Hub Motor with Wheel 1 pc Display(Optional) 1 pc Left PAS sensor 1 pc Controller Box 1 pc Motor Controller 1 pc Brake Lever or brake sensors 1 pc Thumb Throttle. 1 pc 1T4 Cable 1 pc Headlight 1 pc Sticker 1 pc Plastic Straps 1 pc XT60 Cable. Powerful Brushless Gearless Motor. This 48V rear hub motor, delivering up to 66N. M of peak torque and an impressive efficiency rate 82%. This motor ensures better stability and climbing ability, providing a thrilling riding experience and offering strong acceleration and exceptional climbing ability, making it ideal for various terrains and conditions. This ebike conversion kit designed for replacement of traditional wheels, fits for bikes of aluminum alloy with rear dropout size (rear fork width) 135-142mm, and a 10-speed cassette or less, and only suitable for chain drive system equipped with disc brakes. User-friendly installation is facilitated by detailed manuals and video tutorials, ensuring a quick and hassle-free assembly experience. Should you face any challenges during the setup, feel free to reach out to us for a comprehensive installation guide. Our support team is always ready to assist you.