Shimano RD-RX815/RX810 GRX Rear Mech Pulley Set

The Shimano RD-RX815/RX810 GRX Rear Mech Pulley Set helps you keep your GRX rear derailleur running smoothly by replacing worn guide and tension pulleys. You use it to restore crisp shifting, as the matched pulley profiles, tooth design and sealed bearing layout keep your chain tracking cleanly through the derailleur.

Key Features:

• Guide Pulley with profiled teeth: This pulley uses Shimano’s shaped tooth profile and sealed bearing design to control chain movement through the upper derailleur path, which reduces friction and stabilises chain engagement so you maintain consistent, accurate shifts under load.
• Tension Pulley with Shimano-specific cage fit: This lower pulley is built with a Shimano-matched offset and bearing seat that manages chain tension as it leaves the cage, helping you reduce unwanted chain slack so the drivetrain stays steady across the cassette.
• Genuine Shimano matched pair: This set is produced to Shimano GRX RD-RX815 and RD-RX810 specifications, which ensures the pulleys sit in the correct alignment within the cage and allows you to restore the intended shifting feel and dependable performance of the derailleur.

Use this pulley set to bring back clean and predictable shifting when your existing pulleys begin to wear, which supports smooth gear changes on day-to-day rides. The sealed bearings and correct tooth shapes give you reliable chain control, which is important for consistent drivetrain function. This set is a smart addition to your maintenance routine when you want a simple, dependable way to keep your GRX derailleur working as it should.