DER PART KOGEL PULLEY KOLOSSOS w/INNER CAGE OS XTR 9100 BK

Upgrade for Shimano XTR and XT 12 speed rear derailleurs
Built to offer extremely low friction paired with increased stiffness for loss free shifting
Long tooth profile on lower pulley offers best possible chain retention
Lower pulley assembly features a chain catcher to prevent jams
Can be used dependably on or off road
Oversized 14 and 18 tooth Kogel pulleys