American-Made rear wheel sprockets for 1973-up wheels. Choose from light weight 7075-T6 aircraft quality hardened aluminum alloy or high quality carbon steel. Manufactured in full width for size 530 chain, for maximum strength. Available in dished (.245" offset) or flat for standard Harley® 3.250" bolt circle 5-bolt pattern. 1994-2002 tube-frame Buell 5-bolt pattern available in flat only. Note: if replacing a sprocket provided in a Zipper's chain conversion kit, measure the center hole size of your existing sprocket and order the same center hole replacement.