Shimano GRX RD-RX820 12 Speed Rear Derailleur For Double

Shimano GRX RD-RX820 12 Speed Rear Derailleur For Double

Features:

• Silent and secure rear shifting on rough terrain

• Adjustable chain stabilizer prevents chain slap and drops

• Smooth and reliable shifting on mixed surfaces

• ON/OFF stabilizer switch matches terrain

• Wide gear ratio compatible up to 11-36T

• For use with double chainset

• Compatible with 12-speed Hyperglide+ chains

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.

Technical specifications:

• Speeds: 12s

• Shifting: Mechanical

• Max tooth: 36T

• Weight: 270g