Bearing 61803 (6803)

All CeramicSpeed bearings are manufactured by hand in Denmark. The super smooth Grade 3 CeramicSpeed 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.
Each bearing is optimised with a low viscosity CeramicSpeed "blue grease" to minimise friction and increase bearing life. The bearings are completed with non-contact seals that prevent the ingress of dirt and moisture. CeramicSpeed bearings can be used for any cycling discipline: Road, TT, Tri, Track, Cross and MTB. The benefits are super low friction, improved power transfer and extended bearing life.
During the manufacturing process, we check each bearing four times by hand to ensure that all parts fit perfectly.
CeramicSpeed balls are 400% smoother, 128% harder and 58% lighter than standard steel bearings typically used in the bicycle industry. When comparing CeramicSpeed balls to other ceramic balls in the industry, you will find that CeramicSpeed balls are 15% harder, have 99% more loads and are 100% smoother.

SPECIFICATIONS