CeramicSpeed Ceramic Bearing - 6903
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Pickup available at RA Cycles - Brooklyn
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CeramicSpeed Ceramic Bearing - 6903
CeramicSpeed Ceramic Bearing - 6903 Info
The CeramicSpeed Ceramic Bearing - 6903 is a direct upgrade over the steel bearings your bike shipped with — built around silicon nitride ceramic balls running against hardened steel raceways for a measurably smoother, lower-friction rotation. The result is less energy lost to bearing resistance and a longer service life, with CeramicSpeed claiming three to five times the longevity of a standard bearing.
The balls sit in a reinforced polymer cage and are greased with CeramicSpeed's own lubricant, formulated to work with the ceramic construction rather than against it. Dedicated seals are designed to keep moisture and contamination out, so the bearing holds onto that smooth action well into its lifespan — not just when it's new.
CeramicSpeed Ceramic Bearing - 6903 Specs at a Glance
- Ball material: Silicon nitride ceramic
- Raceway material: Hardened steel
- Cage material: Reinforced polymer
- Lubrication: CeramicSpeed proprietary grease
- Bearing size: 6903
