Includes:
3 piece crank conversion kit for motorized bicycles

2 heavy duty bottom bracket with SILVER CUPS:  51.54mm (2") OD
3 screws to connect the heavy duty bottom bracket cups
Bottom bracket bearings and hardware
134.5mm (5") wide spindle and screws to receive crank arms

Application:

Use with 3-piece crank sets 510100, 510101, 510102
Use with single speed bicycles: cruisers, choppers, motorized bicycles
The wide spindle moves the pedals away from the engine parts