Shimano Rear Derailleur Pulley Set

You should replace your pulleys if the teeth look sharp or pointed rather than flat, or if you notice excessive side-to-side play in the wheels. Worn pulleys often cause sloppy shifting, increased drivetrain noise, and poor chain retention.

No, this specific set (Y3GE98010) is engineered specifically for the Shimano GRX RD-RX810 rear derailleur. Always check your derailleur's model number before purchasing to ensure a proper fit.

Yes, this set includes both the guide pulley (the upper wheel) and the tension pulley (the lower wheel). It is best practice to replace both at the same time to ensure consistent shifting performance.

If you are comfortable with basic bike maintenance, you can install these yourself with a standard hex key. The process is straightforward, but ensure you note the orientation of the pulleys and the direction of the chain before removing the old ones.

Genuine Shimano parts are designed to match the exact tolerances and material specifications of your derailleur. Using official replacements ensures the best shifting precision and longevity compared to third-party alternatives.