The Shimano Dura-Ace RD-7900 Rear Derailleur Pulley Set is a precision replacement kit designed to renew the guide and tension pulley wheels on your Dura-Ace 7900 rear derailleur. Over time, pulley wheels wear from constant chain engagement — leading to increased friction, noise, and diminished shifting crispness. Replacing them with this genuine set restores smooth chain movement, predictable shifting performance, and optimized drivetrain efficiency, especially for riders who log serious miles or demand premium performance from their road builds.

Each pulley wheel is engineered with exacting tolerances to match Shimano’s original specification, ensuring proper spacing and engagement with 10-speed chains. The guide pulley helps lead the chain into each gear cleanly, while the tension pulley manages chain wrap and slack — both critical for sharp, responsive shifting under load. Durable materials and precision machining help these pulleys hold up to regular use, providing a crisp feel that complements the rest of your high-end drivetrain.

Installation is straightforward with standard tools used for derailleur maintenance: remove the old pulleys, clean the cage, and fit the new set to restore function. Whether you’re servicing a vintage Dura-Ace build or refreshing worn components, this pulley set brings back the refined shifting experience riders expect from Shimano’s flagship road groupset.