Bafang BBS/-HD Mid drive kit is compatible with a wide range of bikes, including mountain bikes and road bikes. This kit is designed to fit a standard 105-125mm (length) and 34-36mm (internal diameter) bottom bracket. 850c display Powerful and Reliable Motor. The BAFANG 1000W 48v motor has a maximum torque of up to 160 N. M, making it perfect for climbing hills and reaching speeds of over 35mph on the flats and much faster down hills. It’s a great item for anyone who loves to ride, including your spouse or elderly family members (tunable up to 1500w) Easy Installation & Riding Modes. Our kit comes with an installation video and instruction manual to make installation a breeze. You can choose from three riding modes: E-bike & Pedal Assisted bicycle and Push assit bicycle. With this BAFANG ebike conversion kit, you can build your own E-bike and never worry about traffic jams again Complete Accessories:Our kit comes with most the necessary accessories, including the bafang Mid-drive motor, brake lever or mechanical brake sensor cables, thumb throttle, chainring wheel, crank, LCD display, speed sensor, 1T4 wire, locknuts, wrench, and an ebike headlight (in default) Local Service Center:Local warehouse in UK/EU.