To make the BB841P a tough bottom bracket we use the best materials This means the shell is made from a combination of fibre and plastic This allows us to machine it precisely and allows it to fit precisely in the frame and eliminate squeaks It also provides a stable platform for the bearings and gives them a longer lifespanFeaturesType Press FitFrame Type BB86BB895BB92dia41x86589592Crank Type SHIMANOdia24

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