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The Record external bottom bracket cups are suitable for 11 speed Campagnolo drivetrains only. Part of the Ultra-Torque system they provide wide bearing placement for additional stiffness and power transmission. Campagnolo's USB bearing technology combines high quality ceramic ball bearings produced by Campagnolo themselves with stainless steel races for silky smooth running. Compatible with BB30, 86 and 5x41 oversized bottom brackets with optional OS-FIT adaptor.