SRAM Rear Derailleur GX 1X11/Force1/Rival1 Type 2.1 Cage+Pulley Kit Long Cage

SRAM now offer a new Pulley and Cage Assembly to rebuild your SRAM rear derailleur. This new system allows you to replace and repair bent derailleurs and get your old damaged derailleur back into operation. These Pulleys must be installed in correct positions: lower pulley is larger than the upper pulley