61903-2RSF/HC (6803) Hub Bearings

The CeramicSpeed 61903-2RSF/HC (6803) Hub Bearings are precision-engineered ceramic hybrid bearings designed for cyclists who want to extract every watt from their drivetrain. Built to replace standard hub bearings across a wide range of wheel systems, these bearings reduce friction and rolling resistance — making them a worthwhile upgrade whether you're grinding up the Western Ghats or chasing fast laps around Hyderabad's Outer Ring Road.

Our Take

India's riding conditions are demanding: gritty roads from Pune to Chennai, monsoon-season contamination, and summer heat well above 35°C all accelerate wear in standard steel bearings. CeramicSpeed's hybrid ceramic construction handles these conditions with noticeably lower rolling resistance and longer service intervals. For riders who regularly climb routes in Lonavala, Khandala, or Coorg, the reduced friction translates directly into less fatigue on long ascents — a genuine, measurable difference in real-world riding.

Sizing for Indian Riders

These are wheel hub bearings, so sizing is determined by your hub's bearing seats rather than rider body size. The 61903-2RSF/HC corresponds to the 6803 bearing standard. Before purchasing, confirm your hub's inner diameter, outer diameter, and width specifications with your wheel manufacturer or local bike shop. This sizing is consistent across European and Indian market hubs, so no regional adjustment is needed.

Compatibility Notes

The 6803 bearing standard is widely used across road, gravel, and mountain bike hubs from brands including DT Swiss, Chris King, Shimano, and many others. These are double-sealed (2RS) bearings suitable for wet and dusty Indian road conditions. Always clean bearing seats thoroughly before installation and use a proper bearing press to avoid damage during fitting.

Pairs Well With

Consider pairing these hub bearings with a quality wheelset for the full upgrade effect. A ceramic-compatible lubricant or grease will extend service life further. Bottom bracket bearings from CeramicSpeed make a natural companion upgrade, and a bearing press tool kit is essential for clean installation at home or in the workshop.

Explore the full Ceramic Speed collection at Cobbled Climbs

Why buy from Cobbled Climbs

• 100% genuine — authorised Ceramic Speed retailer in India
• Free delivery on orders above Rs. 2,500
• Cash on delivery available nationwide
• 7-day easy returns
• Shipped from Mumbai
• Expert advice — our team rides this gear

CeramicSpeed was founded in Denmark in 2003 with a single goal: reduce friction in cycling drivetrains. Today the brand is the global benchmark for ceramic bearing technology, trusted by WorldTour professionals and performance-focused riders alike. Their bearings are manufactured to exacting tolerances and are consistently selected for Indian conditions by riders who demand durability and speed.

Why pay full price when loyalty pays back?

Club House rewards you for every purchase — up to 5% cashback, 100 bonus points to start, birthday rewards, and early access to limited drops. It’s our way of saying thanks for riding with us.

Shipping:
We ship all orders within 48 hours, excluding Sundays and public holidays. Delivery typically takes 3 to 5 days depending on your location.

Returns:
If your item arrives damaged, incorrect, or doesn’t fit, you may request a return within 7 days of delivery. Email us at support@cobbledclimbs.com with your order details. Items must be unused and returned in original packaging with all tags and labels intact.

Sale Item Guidelines:
Products purchased on sale are final sale and not eligible for return or exchange. Please double-check sizing, fit, and product details before purchasing.

Please note:
We follow a no money refund policy. Eligible returns are offered store credit or exchange only.