Sram Eagle MTB 12T/14T Ceramitech Pulley Set (set of 2)Info Product Intro Vid Maintenance Vid When SRAM launched the Eagle 12 speed group, we were absolutely blown away by its massive 500% gear rangethe same you'd find with many 2x drivetrainsall without dealing with the added weight or annoying miss shifts of a pesky front derailleur. The massive pulleys in the rear derailleur seemed perfect until we tried to spin them and tried, and tried. Honestly, the stock Sram Eagle pulleys are probably the worst