Bearing 61903/18

All CeramicSpeed bearings are built by hand in Denmark. The super smooth Grade 3 CeramicSpeed Silicon Nitride balls match (within microns) hardened steel raceways that feature an ultra smooth polished groove. The balls are held in place by a reinforced polyamide cage.

Each bearing is optimised with a low viscosity CeramicSpeed "Blue Grease" to minimise fiction and increase the life of the bearing. Non-contact seals complete the bearings, keeping dirt and moisture out. CeramicSpeed bearings can be used for any cycling discipline - Road, TT, Tri, Track, Cross and MTB. The benefits are super low friction, better power transfer and increased bearing life.

During the manufacturing process, we check each bearing four times by hand to ensure that all parts fit together perfectly.

CeramicSpeed balls are 400% smoother, 128% harder and 58% lighter than standard steel bearings typically used in the bike industry. When comparing CeramicSpeed balls with other ceramic balls in the industry, you will find that CeramicSpeed balls are 15% harder, have 99% more loads and are 100% smoother.

SPECIFICATIONS