CeramicSpeed 61903-2RSF/HC5 Bearing

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 CeramicSpeed’s 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:CeramicSpeed’s 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.

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.