Shimano GRX RD-RX812 11-Speed GS Cage Rear Derailleur

• GRX 11 speed rear derailleur for 1X cranks
• Adjustable chain stabilizer prevents chain slapping and drops
• Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
• Low sprocket: Max. 42T/Min. 40T
• Top sprocket: 11T