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Race Face's Cinch BSA30 Bottom Bracket uses high quality bearings that are factory filled with Phil Wood grease for a silky smooth feel and excellent durability. The cups are machined for a high tolerance frame fit and includes an industry exclusive inner sleeve to protect against water ingress. The BSA30 cups are installed with a RF BSA30 cup tool or with BSA30 standard tools from Rotor, Zipp, and Enduro.