With its integrated chain stabilizer, the Shimano GRX RD-RX820 1x12-speed long-cage rear derailleur delivers quieter shifting and more secure chain management on rough terrain.
- Compatible with 10-51T, 12-speed Shimano MTB cassettes (not included), meaning you'll never run out of gears even on the steepest jeep road or high mountain singletrack ascent
- Shimano SHADOW RD+ technology with an adjustable chain stabilizer to prevent chain slap and drops
- Chain tensioner has an on/off switch for smooth and reliable shifting on mixed surfaces and easy wheel removal
- Top sprocket: maximum 10T/minimum 10T
- Low sprocket: maximum 51T/minimum 51T
- Total capacity: 41T
- Interchangeable, replaceable GS/SGS derailleur cage
Imported.
View the Shimano GRX Product LineView all Shimano Rear Derailleurs| Best Use | Gravel Cycling |
|---|---|
| Derailleur Type | Rear |
| Cage Length | Long Cage |
| Max Rear Cog Size | 51T |
| Speeds | 12-speed |
| Weight | 288 grams |