Bb90 trek shimano

CyclingCeramic bottom brackets are combined with low friction ceramic bearings and are more durable than standard bearings. The high quality of the bottom bracket housings enables them to achieve high performance. They have been designed to offer a lightweight package and, thanks to the design of the seals, allow maximum protection. The extreme hardness of CyclingCeramic balls results in a 4 to 5 times longer bearing life compared to standard bearings, the special grease keeps the bearings sealed and protects them from external elements that can prevent proper operation.