C-BEAR OCM Shimano Dura-Ace 12-speed Full Ceramic Derailleur Pulleys

The C-BEAR OCM Full Ceramic derailleur pulleys for the Shimano Dura-Ace R9250 12-speed rear derailleur work with ceramic ball bearings that run in ceramic grooves. They are larger than the original derailleur pulleys. In this way, you significantly increas