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 13-tooth upper and 19-tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls
- 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
- Compatible with Shimano GRX 810 & GRX 815, Shimano Ultegra RX 800 & Ultegra RX 805
- Cassette compatibility up to 11-36
- Four spring tension settings allow customized setup based on ride conditions
- Largest Cog: 36
- Fits Brand: Shimano
- Fits Model: Shimano GRX 810 & GRX 815 , Shimano Ultegra RX 800 , Ultegra RX 805
- Defined Color: Black
