The BB30 Bearing Kit from Enduro Bearings is a top quality product designed for use with 30mm cranksets and BB30 framesets. This kit includes XD-15 Ceramic-Hybrid, ABEC-5 bearings, as well as all the necessary seals and spacers for a professional installation.This exclusive kit from Enduro Bearings features XD-15 Ceramic-Hybrid bearings, which are made from corrosion-proof nitrogen steel races and Grade 3 ceramic balls. These bearings are designed to provide the ultimate high performance setup, with deep-groove raceways allowing for maximum contact area and improved performance and longevity. The bearings are also filled with Kluber NBU52 grease, which sticks to the balls and continues to provide smooth operation over time.One of the most impressive features of XD-15 bearings is that they actually improve with use. As the bearings wear-in, the balls make the races even smoother, resulting in faster and smoother performance. This is in contrast to other ceramic-hybrid bearings on the market, which may only provide initial advantages.Bike Radar has praised the XD-15 as the best bottom bracket they have ever tested, and Enduro Bearings is so confident in the quality of this kit that they offer an unlimited lifetime bearing and race warranty.For easy installation and removal of this bearing kit, we recommend using the BRT-002 (EB8190) 30m x 42mm bearing tool.Enduro Bearings offers a range of bearing options, including High-Carbon Chromium Steel, 440C Stainless Steel, Ceramic-Hybrid, and XD-15 with Ceramic or Stainless Balls. All of their bearings are engineered with deep groove races for maximum ball size and feature dual-lip seals for ultimate protection against the elements.Shell Fitment: BB30Bearings: XD-15 CeramicSeal Type: LLBGrease: Kluber NBU52 GreaseAxle Size: 30mmWarranty: Unlimited LifetimeEnduro Reference Number: BKS-54121