Shimano -
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. Shimano RD-RX822-GS rear derailleur with medium cage is compatible with 10-45t, 12-speed Shimano MTB cassettes Interchangeable, replaceable GS/SGS derailleur cage Shadow RD+ design, combined with the adjustable chain stablilizer, prevents chain slap and drops ON/OFF stabilizer switch matches terrain for smooth and reliable shifting on mixed surfaces Compatible with HG 12-Speed Chains Largest Cog: 45 Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard Chain Wrap Capacity (teeth): 35 Cage Length: Medium Rear Der/Shifter Compatibility: Shimano Road Drivetrain Speeds: 12 Weight: 290