CeramicSpeed OSPW Pulley Wheel System for Shimano 9100/9150 and 8000 SS/8050 SS - Coated Races, Alloy Pulley, Carbon

The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur. The design includes an integrated stop tower for easier mounting Features a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimization of the rear derailleur Coated bearing races increase bearing service life by increasing hardness of race and reducing corrosion Precision machined aluminum pulleys are durable and lightweight Carbon fiber cage Includes an integrated stop tower for easier mounting Compatible with 9100/9150 and 8000 series - exception being the R8000 GS (long cage) or clutch equipped Ultegra RD RX800 and RX805