CeramicSpeed OSPW Pulley Wheel System for Shimano 9000/6800 Series - Alloy Pulley, Carbon Cage, Black

The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.

• Hardened steel bearing races
• Only compatible with Ultegra 6700/6770/6800/6870 mechanical and Di2 rear derailleurs and Dura Ace 7900/7970/9000/9070 mechanical and Di2 rear derailleurs (up to 28t cassettes)
• Not compatible with Shimano Dura-Ace 9100/9150 and Ultegra 8000 series rear derailleurs