The BKC-0802 is a BSA Thread-In, Ceramic-Hybrid, XD-15, Angular Contact, Bearing Bottom Bracket designed for 73mm BSA framesets and Shimano (24mm) Cranksets. This Bottom Bracket is exclusive to Enduro Bearings and offers XD-15 15° Angular Contact cartridge bearings pressed into precision machined aluminium cups that simply thread directly into the BB shell. Enduro XD-15 Pro bearings utilize XD-15 steel, the same as our XD-15 Corsa bearing, and offer a 15° angular contact sealed bearing in a standard-sized cartridge. These bearings feature deep-groove raceways allowing for maximum sized Grade 3 Silicon Nitride ceramic balls, which result in increased contact area and improved performance and longevity. These bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. Enduro XD-15 bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride Grade 3 ceramic balls in a proprietary process, resulting in the ultimate high-performance bearing setup. This thread-in solution allows you to fit your Shimano-type 24mm cranks into your BSA threaded bottom bracket shell without any hassle. We are confident in the quality of our bearings and offer an unlimited lifetime bearing and race warranty. Unlike other bearings, the XD-15 bearings actually improve with use. As they wear-in, the balls make the races even smoother, resulting in even better performance. While other ceramic-hybrid bearings on the market may claim speed and power advantages on day one, the Enduro XD-15 bearings not only provide the same initial advantages, but they also continue to get faster and smoother over time and use, while other options will only get slower. Shell Fitment: BSABearings: XD-15 CeramicSeal Type: LLBGrease: Kluber NBU52 GreaseAxle Size: 24mmWarranty: Unlimited LifetimeEnduro Reference Number: BKC-0802