Kogel Kogel Derailleur Pulley Full Ceramic Shimano OS Full Ceramic Black/Blue

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