Shimano Deore XT RD-M8100 Rear Derailleur Pulley Set Description: Replace worn-out pulleys and add smooth and efficient pedaling back into the ride. Includes one tension pulley and one guide pulley for select Shimano rear derailleurs. Features: Sealed bearings in both guide and tension pulleys deliver low maintenance and reduced friction for quieter, smoother shifting performance One tension pulley and one guide pulley Compatibility: Deore XT RD-M8100 GS & SGS Rear Derailleurs Deore XT RD-M8120-SGS Rear Derailleur Deore XT Di2 RD-M8150-SGS Rear Derailleur GRX RD-RX822 GS & SGS Rear Derailleurs