BBR Tuning 2-Stroke/4-Stroke Motorized Bicycle Non-Free Wheel Heavy Duty Axle Kit &ndash; Gas Bike Rear Axle Upgrade AXLE MOUNTED SPROCKET: The BBR Tuning Motorized Bicycle Non-Free Wheel Heavy Duty Axle Kit features a new hub for your existing bike rim that has a direct mount for your sprocket. No more clamp assembly damaging spokes. This kit allows you to build an entire motorized bike wheel with a drum brake and a freewheel sprocket from the hub up. RELAIBLE DRUM BRAKE: This kit features a heavy duty drum brake so that you won't wear out the side of your rim with caliper brakes. These brakes provides excellent stopping power which is necessary for those high speed builds INSTALLATION: Assembly this axle kit is for advanced builders and should have prior knowledge of assembling a bicycle wheel. You will need to remove your old hub and respoke your new axle. UNIVERSAL FIT: Designed to fit most standard 26 Inch cruisers, mountain bikes, city bikes and beach cruiser. PACKAGE INCLUDES: 1x Non-free wheel axle, 1x Rear Engine Sprocket, 1x Drum Brake, 1x Sprocket Hardware