Description
Performance
Built for gravel, the GRX RD-RX820 delivers silent, secure 12-speed shifting on rough and mixed terrain. Shimano's Shadow RD+ design with an adjustable chain stabiliser prevents chain slap and drops, and an ON/OFF stabiliser switch lets you match the setup to the terrain. The low-profile body reduces the risk of crash damage.
Options
Available in 36T, 46T and 51T maximum-sprocket versions to suit different cassette ranges - the wider-capacity options support mullet and wide-range setups. Select the version that matches your cassette.
Cassette Compatibility
36T: Top sprocket: Max. 11T/Min. 11T
Low sprocket: Max. 36T/Min. 34T
46T: Top sprocket: Max. 10T/Min. 10T
Low sprocket: Max. 45T/Min. 45T
51T: Top sprocket: Max. 10T/Min. 10T
Low sprocket: Max. 51T/Min. 51T
Features
- Shimano GRX RD-RX820 12-speed rear derailleur - secure, quiet gravel shifting
- Shimano Shadow RD+ design with an adjustable chain stabiliser to prevent chain slap and drops
- ON/OFF stabiliser switch to match the terrain
- Silent, secure shifting on rough and mixed surfaces
- Low-profile design reduces the risk of crash damage
- Available in 36T, 46T and 51T maximum-sprocket versions - select to match your cassette
Delivery & Returns
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