Shimano GRX RD-RX822 12sp. Rear Derailleur

Enhanced chain security and quieter shifting for gravel riding. 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

• RD-RX822-GS rear derailleur with medium cage is compatible with 10-45t, 12-speed Shimano MTB cassettes, designed to keep you in the optimal cadence through rough terrain
  
• RD-RX822-SGS rear derailleur with long cage is compatible with 10-51t, 12-speed Shimano MTB cassettes, meaning you’ll never run out of gears even on the steepest jeep road or high mountain singletrack ascent
  
• 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
  
• Series: Shimano GRX 12-speed
  
• Top Sprocket Max: 10T/Min: 10T
  
• Low sprocket: Max. 45T/Min. 45T (medium cage); Max. 51T/Min. 51T (long cage)
  
• Total capacity: 35T (medium cage); 41T (long cage)
  
• Compatible Chain: HG 12-speed
  
• Recommended Cassette: CS-M8100-12/CS-M7100-12, 10-45T (short cage); CS-M8100-12/CS-M7100-12, 10-51T (long cage)
  
• Pulley Teeth: 13T
  
• Rear Speeds: 12 speed
  
• Weight: 290g. (medium cage); 288g. (long cage)