Oversized pulleys fit the latest generation of Shimano derailleurs: Dura Ace R9100, Ultegra R8000 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 get it just right.
If you are looking for the best pulleys to fit the previous generation Ultegra (6800), please have a look at our 12 tooth Shimano road pulleys.
For Dura Ace 9000 and Sram road short cage derailleurs, have a look at our 11 tooth 'not for instagram' derailleur pulley set.