Product Details

The Shimano GRX RX822 12-speed rear derailleur is designed for gravel use with 1x drivetrains and and mountain bike cassette. It has quiet, reliable shifting and excellent chain security.

In the version with a long SGS cage, it is compatible with the 10-51t ratio and the shorter GS cage  shifts cassettes with 10-45t. In fact, the cage can be replaced, so you don't need a completely new rear derailleur when you change the cassette. Both versions feature Shadow Plus technology, a built-in chain stabiliser that prevents the chain from slapping on rough surfaces and thus counteracts chain drop. The function can also be switched off when you are riding on smoother roads or when you want to remove the wheel

• Mechanical rear derailleur for gravel bikes with 1x12-speed setup and MTB cassette
• Safe and quiet shifting on mixed surfaces
• Smooth and reliable gear changes
• Cage replaceable for full flexibility
• Adjustable chain stabilisation prevents chain drop
• Stabiliser with on/off switch to adapt to the terrain and for easy wheel removal
• Flat design prevents getting stuck on obstacles
• Painted cage plates
• Derailleur Pulleys: 13 tooth 
• Derailleur pulley bearings
• Weight: approx 290g
• Compatibility:
  • Shift/Brake Lever: ST-RX820, ST-RX610
  • Cassette (GS): M9101-12, M9100-12, M8100-12, M7100-12
  • Cassette (SGS): M9101-12, M9100-12, M8100-12, M7100-12, M6100-12
  • Chain: CN-M8100, CN-M9100, CN-M7100, CN-M6100

About Shimano
Established in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.