These oversized pulleys fit the newest version of Dura-Ace R9200, Shimano's flagship 12-speed drivetrain
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 other large pulley systems.
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 other large pulley systems.