The PF30 standard has opened design possibilities for mountain bikes. The CeramicSpeed PF30 Shimano MTB Bottom Bracket gives you the ability to install Shimano and other 24mm diameter spindle cranks on your PF30 MTB. Features: Grade 3 Silicon Nitride balls Coated races increase bearing service life by increasing hardness of race and reducing corrosion Reinforced polyamide cage and non-contact seals Hand built in Denmark CeramicSpeed products with coated bearings include a 6-year warranty Specifications: Frame Interface: PF30 Spindle Interface: 24mm (Shimano Hollowtech II, FSA MegaExo, Surly OD, FSA MegaExo Light, RaceFace EXI) Bottom Bracket Shell ID: 46 Shell Width: 73mm Bearings: Ceramic Color: Black Weight: 118g