Shimano Rear Derailleur GRX RD-RX820 12s Max 34T

Description:

The GRX rear derailleur’s integrated chain stabilizer helps reduce noise and maintain precise, secure shifting across mixed terrain. Switch the chain tensioner on or off to suit the ride, and enjoy compatibility with MTB cassettes featuring a low sprocket of up to 42T.

Specifications:

• GRX 12 speed rear derailleur for double cranks
• Adjustable chain stabilizer prevents chain slapping and drops
• Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
• Maximum front difference: 17T
• Total capacity: 42T
• Low sprocket: Max. 34T/Min. 30T
• Top sprocket: 11T