Oversized Derailleur Pulleys for Shimano Ultegra R8000 - Hybrid Ceramic - 12/14T derailleurtype-Sram use a 16 notch tool

use a 16 notch tool with an internal diameter of 42

Oversized ceramic pulley systems are an excellent way of reducing the additional friction caused by clutch derailleurs

Shimano 12-speed Ultegra/XT (fits all Shimano road and MTB 12-speed drivetrains)

Chains are available in

Experience next-level braking performance and maximize the braking power of your Sram Red 22 / Force 22 / Rival 22 / Level (pre-2019) calipers with Kogel replacement disc brake pads

Oversized Derailleur Pulleys for Shimano Ultegra R8000 - Hybrid Ceramic - 12/14T derailleurtype-Sram use a 16 notch toolOversized pulleys fit the latest generation of Shimano derailleurs: Dura Ace R9100, Ultegra R8000 R8100 and 105 R7000. By using the standard cage on your Shimano derailleur, you will feel the benefits of reduced articulation in the chain, while retaining accurate shifting. Something that has been a negative side effect of many large pulley systems. Switching to an oversized set might require to install a longer chain. Here is a video explaining how to