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

Features
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, ensuring you never run out of gears on steep jeep roads or mountain singletrack ascents
Interchangeable, replaceable GS/SGS derailleur cage
Shadow RD+ design, combined with the adjustable chain stabilizer, prevents chain slap and drops
ON/OFF stabilizer switch matches terrain for smooth and reliable shifting on mixed surfaces

Specifications
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 (medium cage); CS-M8100-12 / CS-M7100-12, 10-51T (long cage)
Pulley Teeth: 13T
Rear Speeds: 12-speed

Mfr Claimed Weight
290g(Medium), 288g(Long)