The ThreadFit 30 bottom brackets are designed and built to be durable, serviceable, and silent. Bearings can be serviced with the Chris King Grease injector tool.Chris King Fit Kit required for use (sold separately)Legendary King made-in-house angular-contact bearingsFully serviceable and backed by the King Lifetime Warranty this bottom bracket will outlast your bikeItem SpecificationsBB Shell Width (mm)68BB Shell Width (mm)73BB/Frame InterfaceEnglishBottom Bracket Shell I.D.1.37Defined ColorGold Chris King Threadfit 30 Bottom Bracket Bottom Brackets UPC: 841529278316