Bicycle Components & Parts

6903-2RS HYBRID CERAMIC BEARING KIT Kit includes size: 6903-2RS (2PCS) 17X30X7MM Replacing your dried out or pitted wheel bearings with hybrid ceramic bearings has never been more affordable! Lower your rolling resistance compared to standard bearings. You will be surprised at the reduced rolling resistance. Increase your pedaling efficiency compared to standard steel bearings. Our ABEC 5 bearings feature chrome steel races which are harder and lower friction than stainless steel. The balls are high quality Si3N4 (silicon nitride balls grade 6) and nylon cages, filled with Shell Alvania RLQ2 grease. Rubber seals are pliable with just the right amount of preload to keep dirt out and rolling resistance low. What some of our recent buyers are telling us about upgrading to our ceramic bearings: I just installed my new bearings; Wow, what a difference! Excellent upgrade! Great price! Thanks HubDoctor® Excellent service, fast shipping, great price, the best ceramic bearings on Ebay! Fast Shipping, Superb Quality, Purchase with confidence from this dude!! Bearing image is for illustration only and can vary from the actual bearing numbers listed in the kit. Seal color can be black or blue depending on stock. The performance is identical. Free shipping in the USA! We ship daily! Combined shipping on international orders. We will credit your invoice to reflect the combined shipping or wait for us to invoice you before payment. Check out our other items, Including our HubDoctor® Mavic® Freehubs Rebuild Kits The cost-saving solution for rebuilding Mavic® cassette hubs.