SRAM X.0 10 Speed Medium Cage Rear Derailleur Pulley Kit Parts Mountain Derailleurs

SRAM X.0 10 Speed Medium Cage Rear Derailleur Pulley Kit. We've all broken a derailleur cage at some point or other. If you need a new pulleyspring system for your SRAM X.0 long cage rear derailleur, then this is your ticket. This kit includes the Black Box pulleys, spring and cage. It comes in several different colors, so you can customize your rear D to match your whip.