The Enduro Ceramic Radial Bottom Bracket Bearing CH 6806 LLB ABEC-5 is a high-quality ceramic-hybrid radial bearing designed for durability and longevity. Featuring grade 5 Silicon-Nitride Ceramic balls and high-pressure, water-proof grease, this bearing reduces wear and increases bearing life by eliminating steel on steel contact. Perfect as a direct replacement for BB30 and PF30 type bottom brackets, this bearing is a reliable choice for cyclists looking to upgrade their bike's performance.