This WMS racing sprocket hub is precision machined, lightweight, and a proven winner. 

• High quality aluminum racing sprocket hub.

• Anodized black

• Bolt Circle: 5-1/4"

• Threaded Bolt Holes: 1/4-28 (6)

• 1/4" keyway

• 1-1/4" Bore

Sprocket Mounting Hardware NOT Included (Order our part #SGBKF for hardware)