CeramicSpeed Ceramic crank bearings BB30 for 24 mm shaft.

Perfect for frames made for BB30 (42 mm in diameter) and for cranksets with 24 mm shaft, e.g. all Shimano cranksets.

CeramicSpeed makes some of the strongest, most accurate and lightest rolling bearings on the market, they are all ceramic.

Ceramic bearings also provide better utilization of one's watts.