CeramicSpeed Oversized Pulley Wheel System (Red) (Shimano 9100/9150 & 8000/8050)

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. Note: The OSPW System for 9100/9150 and 8000 SS/8050 SS is NOT compatible with Ultegra 8000-GS or 8050-GS (medium cage) derailleurs, nor with the clutch equipped Ultegra RD RX800 & RX805 Features: Proven to be the fastest pulley system, chosen by many of the world's leading cycling teams and professional triathlete Optimized tooth designs offer 3-5 times longer life than standard OE pulleys Coated: metallic layer that covers bearing races making them 75% harder than steel. Even lower friction and highly resistant to corrosion Standard: low drag with hardened steel races and ceramic ball bearings 9100/9150/8000 SS/8050SS is not compatible with 8000-GS or 8050-GS, use Shimano 11sp system 9100/9150/8000 SS/8050SS is not compatible with RX800/805, use Shimano RS80/805 system In the box: complete upper and lower OSPW system, 15ml CeramicSpeed Bearing Oil dropper bottle Specifications: Compatibility: Shimano 9100/9150 & 8000 SS/8050 SS Speeds: 11 Speed Max Cog: 32T Color: Red