Ceramicspeed 61903-2RsfHc5 Bearing Standard

The CeramicSpeed 61903-2RSF/HC5 Bearing delivers extremely low friction, improved power transfer and a lifespan up to five times longer than standard bearings. It is the ideal upgrade for cyclists seeking high-performance rotational efficiency across all disciplines.

Premium Grade 3 Silicon Nitride Balls: The bearing uses CeramicSpeeds ultra-smooth Grade 3 Silicon Nitride balls, matched within microns to hardened steel raceways polished to an exceptionally smooth groove. This combination dramatically reduces rolling resistance and enhances overall drivetrain efficiency.

Optimized With Low-Viscosity Blue Grease:CeramicSpeeds proprietary Blue Grease minimises friction while extending bearing life, maintaining peak performance over thousands of kilometres. Non-contact seals protect the internals from dirt and moisture, making the bearing suitable for Road, TT, Triathlon, Track, Cross and MTB.

Superior Strength and Smoothness Over Steel Bearings: CeramicSpeed balls are 400% smoother, 128% harder and 58% lighter than traditional steel balls found in standard bicycle bearings. This translates into faster acceleration, reduced energy loss and significantly improved durability under high load.

Outperforms Other Ceramic Bearings: Compared with other ceramic balls in the cycling industry, CeramicSpeed balls are 15% harder, capable of handling 99% higher loads and 100% smoother. These advantages ensure unmatched stability and long-term performance across demanding riding conditions.

With its exceptional smoothness, long service life and proven efficiency gains, the 61903-2RSF/HC5 Bearing gives riders a tangible performance edge.