Kogel Kogel Kolossos Derailleur Pulley R9100/R8000 Red

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. Fits SS (short) cage and GS (mid) cage right out of the box. Oversized 12 and 19 tooth Kogel pulleys. Compatible with Shimano only