Upgrade the performance of your rear derailleur with Kogel ceramic pulley wheels- a major improvement!
- Pulley for the latest generation of Shimano derailleurs: Dura Ace R9100, Ultegra R8000 and 105 R7000 as well as the long cage of a Sram Wifli
- Narrow wide tooth profile benefits include reduced articulation in the chain while retaining accurate shifting
- May require use of a longer chain
