CeramicSpeed CeramicSpeed Bearing, 61903 (6903) 17x30x7 Ea Headset Service Parts Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-52

Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-52

UPC: 710845006494

Manufacturer Part Number: T2GV018

UPC: 689228383739

CeramicSpeed CeramicSpeed Bearing, 61903 (6903) 17x30x7 Ea Headset Service Parts Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-52All CeramicSpeed Bearings are hand built in Denmark. Super smooth CeramicSpeed grade 3 Silicon Nitride balls are matched (within microns) with hardened steel raceways that feature an ultra smooth polished groove. The balls are held in place by a reinforced polyamide cage. Every bearing is optimised with a low viscosity CeramicSpeed Blue Grease to minimise fiction and increase bearing life. Non contact seals complete the bearings, keeping dirt and