The Shimano RD-RX820 rear derailleur 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. This rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. The chain tensioner has an ON/OFF switch for outings on smooth surfaces.
Silent and secure rear shifting on rough terrain
Adjustable chain stabilizer prevents chain slap and drops
Shimano Shadow RD+ offers less distraction a quiet drive train reduced chain slap and a solution for chain drop
ON/OFF stabilizer switch matches terrain for smooth and reliable shifting on mixed surfaces
Compatible with HG 12-Speed Chains
| Largest Cog |
36 |
| Rear Der/Shifter Compatibility |
Shimano Road |
| Rear Derailleur Mount Type |
10×1 Standard |
| Drivetrain Speeds |
12 |
| Weight |
270 |
| Chain Wrap Capacity (teeth) |
42 |
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