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.
- Features two oversized 17-tooth aluminum pulley wheels
- Robust cage crafted from polyamide and carbon fiber for durability and light weight
- Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion
- 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
- CeramicSpeed products with coated bearings include a 6-year warranty