Black Bearing Ceramic bearings for cranksets BB90/95 - GXP (x2)

CERAMIC BEARINGS BLACK BEARING: The Black Bearing bearings are "hybrid" bearings, more commonly called "ceramic". These bearings meet the constraints of cycling (Road, MTB, CLM, Cyclo Cross ...) and are used for wheels, cranksets, derailleur rollers ... Compared to a standard steel bearing, the advantages of hybrid ceramic bearings Black Bearing B5 are numerous:- Weight saving (density of ceramic < that of steel),- Holding at very high speeds,- Much longer life (several times that of a standard),- Less friction = less losses when pedaling,- Better rigidity,- Better precision,- Better mechanical characteristics (hardness, resistance to compression...).