The BSA - BB - XD15 Ceramic - DUB 29mm is a Thread-In, Ceramic-Hybrid, XD-15, Angular Contact, Bearing Bottom Bracket designed for 68mm BSA framesets and SRAM DUB (29mm) Cranksets. This exclusive product from Enduro Bearings features XD-15 15° Angular Contact cartridge bearings that are pressed into precision machined aluminium cups. These cups can be easily threaded directly into the BB shell.The XD-15 Pro BBs from Enduro Bearings use the same XD-15 steel as their XD-15 Corsa bearing. This means that these bearings offer a 15° angular contact sealed bearing in a standard-sized cartridge. The deep-groove raceways allow for the use of Grade 3 Silicon Nitride ceramic balls, which provide increased contact area and improved performance and longevity.Enduro XD-15 bottom brackets are manufactured to the highest standards at the Enduro Bearings production facility in California, USA. These bearings combine corrosion-proof, cryogenically treated nitrogen steel races with Silicon Nitride Grade 3 ceramic balls. This proprietary process results in the ultimate high performance bearing setup.With this thread-in solution, you can easily fit your Shimano-type 24mm cranks into your BSA threaded bottom bracket shell without any hassle. And to ensure your satisfaction, Enduro Bearings offers an unlimited lifetime bearing and race warranty.One of the most impressive features of these bearings is that they actually improve with use. As the bearings wear-in, the balls make the races even smoother. This means that while other ceramic-hybrid bearings on the market may claim speed and power advantages from the start, the Enduro XD-15 bearings not only provide the same initial advantages, but also continue to get faster and smoother with time and use.Shell Fitment: BSABearings: XD-15 CeramicSeal Type: LLBGrease: Kluber NBU52 GreaseAxle Size: SRAM DUB 29mmWarranty: Unlimited LifetimeEnduro Reference Number: BKC-0815