SLR BB30-CP BB30轉Campagnolo Ultra Torgue BB轉換座

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兼容性: 安裝 Campaglono Ultra Torgue 大餅於 BB30 frame. 規格: 車架BB規格 BB30 車架BB闊度 68mm 車架BB直徑 42mm 大餅軸心直徑 25mm Grade 3 陶瓷珠 Balls are rated by their grade. A Grade 3 ball means that the ball i s 3/1,000,000” tolerance of sphericity, and so is extremely round. In fact, the races of any bearing can't come close to this level of precision in their trueness, but every component being closer to perfect helps decrease friction. Another feature of Grade 3 is surface finish, which in this case is free of scratches or scuffs, and to a Show more