The BB30 - Bearing Kit - XD15 Ceramic - DUB 29mm from Enduro Bearings is the perfect bottom bracket bearing kit for SRAM DUB cranksets with BB30 framesets. This top of the line kit includes XD-15 Ceramic-Hybrid, ABEC-5 bearings, as well as all the necessary seals and spacers for a precise, professional installation.What sets Enduro Bearings apart is their exclusive XD-15 Ceramic-Hybrid bearings. These bearings are made with corrosion-proof, cryogenically treated nitrogen steel races and Silicon Nitride Grade 3 ceramic balls. This unique combination results in the ultimate high performance bearing setup.The XD-15 bearings feature deep-groove design raceways that allow for maximum sized Grade 3 Silicon Nitride ceramic balls. This provides increased contact area and improved performance and longevity.The bearings are filled with Kluber NBU52 grease, which only runs better and smoother with time. It is highly resistant to being washed out and engineered to stick to the balls, continually being pulled back into the ball path where it is needed.One of the most impressive features of XD-15 bearings is that they actually get better with use. As the bearings wear-in, the balls make the races even smoother. This means that while other ceramic-hybrid bearings claim speed and power advantages from day one, Enduro XD-15 bearings not only provide those advantages initially, but also get faster and smoother with time and use.Enduro Bearings is so confident in the quality of their XD-15 bearings that they offer an unlimited lifetime bearing and race warranty.Please note that the special 6806/29 bearing in this kit is specifically designed for SRAM Dub cranksets. Enduro makes other kits for cranksets with 30mm spindles.For easy removal and installation of this bearing kit, we recommend using the BRT-002 (EB8190) 30m x 42mm bearing tool with the BRT-016 (EB9651) DUB add-on kit. This tool combination allows for quick removal and installation of bearings with just a few twists of the wrist while the bottom bracket is still on the bike.Shell Fitment: BB30Bearings: XD-15 CeramicSeal Type: LLBGrease: Kluber NBU52 GreaseAxle Size: SRAM DUB 29mmWarranty: Unlimited LifetimeEnduro Reference Number: BKC-54118