Check the listing for details. ROLF VECTOR COMP HYBRID CERAMIC BALL BEARING FRONT & REAR WHEEL KIT. Condition: New. Listed at 32.19 USD. ROLF VECTOR COMP HYBRID CERAMIC BALL BEARING FRONT & REAR WHEEL Replacing your dried out or pitted wheel bearings with hybrid ceramic bearings has never been more affordable! Dramatically lower your rolling resistance compared to standard bearings. 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!! 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) and nylon races, 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. Kit includes sizes: 16100-2RS (1pcs rear freehub) 6000-2RS (1pcs rear hub) 6900-2RS (1pcs rear hub), 6903-2RS (2pcs front hub) Includes freehub outer ball bearing; Total (5) qty bearings. Bearing seals may be black or blue depending on stock. The performance is identical. Photo image for illustration only. Free shipping in the USA! Check out our other items,Including our HubDoctor® Mavic® Freehubs Rebuild Kits The cost-saving solution for rebuilding Mavic® cassette hubs. See our other listings for the HubDoctor® Pro ceramic ball bearing freehub bushing replacement kit and our superior freehub replacement bushings!