CeramicSpeed Ceramic crank bearings BB30 for 24 mm axle.

Perfect for frames made for BB30 (42mm in diameter) and for cranksets with 24mm axles, 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 wattage.