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English threading is currently the most common standard for threaded bottom bracket, and the Campagnolo quick release bottom bracket that fits over it is the only way to achieve the Campy Ultra-Torque connection. English thread of the common name for BSA; B stands for British. The casing is 68 mm wide, 34 mm internal diameter, with reverse thread on the drive side. There are two crank bearings to choose from. Standard bearings have low resistance thanks to hardened steel rings and our ceramic balls. Coated bearings have identical balls installed on coated hardened steel rings for longer life and less bearing drag. Included: Bottom bracket 2 bearings Wave washer All Round Grease Decal