OMNI Racer 9 & 10 Speed TiN Ceramic Derailleur Pulleys Dura Ace Ultegra, XT BLUE
NEWOMNI Racer Ti Ceramic Bearing Derailleur Pulleys. If your looking for all the extra edge you can get, these are for you. Significantly reduce drivetrain friction by up to 60% with these high quality ceramic ball bearings.