C-Bear Ceramic Bearings OCM Aluminium Full Ceramic Pulley Wheels for Shimano/SRAM 10/11-speed

Some call this OverSize, C-Bear simply calls it Original Cage Max, C-Bear Ceramic OCM. C-Bear Ceramic Aluminum Shift Wheels with full ceramic bearings for Shimano 10/11-speed rear derailleurs. Shifters are the fastest rotating bearings on your bike. Upgrading to ceramic bearings is therefore the most effective upgrade. Suitable for the following rear derailleurs: Dura Ace R9100, R9150 Di2 Ultegra R8000, R8050 Di2 GRX XTR M9000 XT M8000 SLX M7000 105 R7000 C-Bear Ceramic Bearings is a Belgian bearing specialist for ceramic ball bearings with best smooth running properties, durability and fitting accuracy. All bearings work without additional spacers and washers. Note: Not compatible with the Shimano DURA-ACE FC-R9200 rear derailleur. Included in delivery: 2x C-Bear Ceramic derailleur wheels