Set of four ceramic hybrid bearings for 2005 and 2006 Mavic Ksyrium SL's ES's, Carbones and carbone Pros. Two for the front hub and two for the rear body. Ceramic bearings are more durable,lighter, and reduce rolling resistance. 1 second per kilometer is what 'they' say...so figure 1 minute in 60k....get the edge....Check out what Zipp charges for the Z series wheels?? $250 shipped
jerry AT kmfunding DOT net
jerry AT kmfunding DOT net