English threading is the most common standard for threaded bottom brackets nowadays, and having a Campagnolo compatible bottom bracket that fits it is the only way to mate a Campy Ultra-Torque. English threading is the common name for BSA; the B stands for British. The shell is 68mm wide, the inner diameter is 34mm, with reverse threading on the drive side.Choose between two crank bearings. The Standard Bearings have low resistance thanks to the hardened steel races and our ceramic balls. The Coated Bearings have the same balls mounted on hardened steel races that are coated for increased durability and lower bearing resistance.Included: Bottom bracket 2 bearings Wave washer Multi-purpose grease Decal