I need to get a back wheel that has a regular sprocket on it for the bike chain, can put a MB sprocket on, and it can pedal backwards. Basically i want a wheel that has a sprocket for a bike and has no brakes. Then i would buy a handbrake assembly from a motorcycle shop and install that. WHERE THE HECK DO I GET THAT FROM!??! ive been looking and calling everywhere. PS: The closer to California the better. any suggestions will do though! Thanks everyone!!!