Enhanced chain security and quieter, more stable shifting for gravel riding
The RD-RX820 is compatible with 11-34T and 11-36T 12-speed cassettes, providing a wide gear range so you can spin a comfortable cadence no matter the terrain type. The SHIMANO GRX 12-speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. And the chain tensioner has an ON/OFF switch for outings on smooth surfaces.
FEATURES
- Silent and secure rear shifting on rough terrain
- Adjustable chain stabilizer prevents chain slap and drops
- SHIMANO SHADOW RD+
- Smooth and reliable shifting on mixed surfaces
- ON/OFF stabilizer switch matches terrain
- Maximum front chainring difference: 17T
- Top sprocket: Max. 11T/Min. 11T
- Low sprocket: Max. 36T/Min. 34T
- Total capacity: 42T
PRODUCT SPECIFICATIONS
| MODEL NO | RD-RX820 |
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| SERIES | GRX 12-speed |
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| Color | Series color |
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| Average weight | 270 |
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| Rear speeds | 12 |
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| Compatible chain | HG 12-speed |
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| Top-normal spring type|SHIMANO SHADOW RD+ | ✔ |
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| Mount|Direct attachment (conventional) | ✔ |
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| Mount|Direct mount | ✔ |
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| Cable adjuster | ✔ |
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| Max. front difference | 17T |
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| Total capacity | 42T |
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| Low sprocket|Max. | 36T |
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| Low sprocket|Min. | 34T |
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| Top sprocket|Max. | 11T |
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| Top sprocket|Min. | 11T |
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| Fluoric coated link bushings | 4 |
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| Pulley|Guide pulley bearing | ✔ |
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| Pulley|Tension pulley bearing | ✔ |
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| Pulley|Teeth | 11/13T |
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| Pulley|Sunken type pulley screw | ✔ |
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| B-axle|Hollow axle | ✔ |
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