Rear Sprocket 530 40T 4 Bolt sku 8376

purchased from an old line dealer who went out of business.  Slightly used, just a little dirty, teeth are excellent.  This mode has an outer black ring that sometimes was used in the 1960's mouinting bolts at 7.8 cm o.c. center opening 8.0 mm across

Please double check your chain size,bolt pattern,  and center hole dimension to make certain this product is for your application