Sram XX1 Ceramic Bearing Rear Derailleur Pulleys 11 SpeedThe Sram XX1 Ceramic Bearing Rear Derailleur Pulleys run on super-smooth, efficient ceramic bearings so your drivetrain rolls with ease. This set is for Sram 1x11 speed rear derailleurs. They are lighter than conventional pulleys and even come with SRAM's ceramic-bearing grease in an easy-to-use 10ml syringe.710845724428
