FSA Ceramic Derailleur Pulleys

For that little bit of extra speed, FSA Ceramic Derailleur pulleys use low resistance long wearing Silicon Nitride Ceramic hybrid bearings, and pulley wheels made from durable DuPont Zytel™. These pulleys will far outlast normal pulleys and are compatible with most derailleur systems, including Campagnolo (10T) or Shimano (11T).