Electric bicycle rear wheel conversion kit features 48V 1500W hub motor for efficient and noiseless running Aluminum alloy frame for durability and stability; thumb throttle with 3 indicators for displaying battery status Fit for any 26' bicycle frame with 5 15/16' rear dropout spacing; compatible for universal disc brake and V brake Electric bike conversion kit includes necessary components for installation Hand brakes shut off the motor automatically for preventing the motor from overheating