The CeramicSpeed BB86 bottom bracket offers bearings with extremely low friction, improved power transfer, and a service life that far exceeds traditional steel bearings. FEATURES: Grade 3 Silicon Nitride balls Hardened races Reinforced polyamide cage and non-contact seals Hand built in Denmark 4 year warranty SPECS: Spindle Interface Type: Shimano Hollowtech II , FSA MegaExo , FSA MegaExo Light , RaceFace EXI BB Shell Width (mm): 86 Bottom Bracket Shell I.D.: 41 BB/Frame Interface: BB86 Weight: 60