With an integrated chain stabilizer Shimano GRX RD-RX822 12-speed rear derailleurs feature an intergrated chain stablizer that delivers quieter shifting and more secure chain management in rough terrain. The chain tensioner has an ON/OFF switch for easy wheel removal.

Largest Cog	51
Rear Der/Shifter Compatibility	Shimano Road
Rear Derailleur Mount Type	10x1 Standard
Drivetrain Speeds	12
Weight	288
Chain Wrap Capacity (teeth)	41
Cage Length	Long
Max Cog Size	51T