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.Included Fit Kit #1 is designed to mate the ThreadFit 30 bottom bracket with a DUB MTB 28.99mm spindleKing made-in-house bearingsKing Lifetime WarrantyItem SpecificationsBB Shell Width (mm)68BB Shell Width (mm)73BB/Frame InterfaceEnglishBottom Bracket Shell I.D.1.37Defined ColorBlackSpindle Interface TypeSRAM DUB Chris King Threadfit 30 Bottom Bracket Bottom Brackets UPC: 841529103274