This is the new hope stainless steel bearing hollowtech road bottom bracket road bike bottom brackets are now made by hope their machined aluminium cups hold full stainless steel bearings for long lasting rolling the bearings made by ina are designed to run directly on the crankset axle without the use of shims or spacers further increasing life and reliability the swiss made bearings feature double sealing giving much greater life span than other units non contact free running labyri