Rear derailleur pulleys 9 Speed SRAM X0 (from 2008) #11.7515.022.000 Black

La pair of X0 rollers from SRAM will replace your worn or damaged rollers. Because even if these parts aren't very big, they're of vital importance to the smooth operation of your transmission.

Intended for X0 models from 2008 onwards, this 11-tooth roller kit benefits from the same quality as the original parts, and features a sealed bearing for greater reliability and durability.
 

Ref: 9223789904221