Front

Centos front derailleurs are precisely manufactured for responsive, accurate shifting under race conditions. - Compatible with Shimano Tiagra 4700 10-speed road systems - Includes adapter for 31.8 and 28.6mm seat tubes

Optimized for Shimano compatible 9-speed road drivetrains, R9 front derailleurs feature metal construction and rapid shifting response. - Cold-forged aluminum body