FSA Ceramic Derailleur Pulleys Shimano RedThe FSA Ceramic Derailleur Pulleys Shimano Red are replacements for normal usage. The Ceramic Bearings move very smoothly.This item comes plastic rings to change compatitbility. A rings will work with Shimano 8-9 & 10 speeds, B rings will work for Shimano 7sp and Campagnolo 8 speeds, C rings will work with Campognolo 9 & 10 speeds, D rings will work with Sram 9.0-9.0SL-7.0 & 5.0. Comes with 2 pulleys, and Plastic rings A,B,C,D.400310022813
