Rear freewheel sprocket for heavy duty axle. For use with 4 Stroke bicycle engine kits - requires Freewheel Thread.
Available in 3 sizes: 44 Tooth, 48 Tooth, and 56 Tooth.
Not sure which sprocket...
Make your own heavy-duty rear wheel for your motorized bike. Each kit includes a chain drive sprocket in your choice of 3 sizes, freewheel sprocket mounting hub, drum brake, and heavy duty axle...