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Equipment > Components > Derailleurs > Gravel - Rear


The Shimano GRX 2x12-speed configuration, tailored for all-road adventures, harmonizes broader gear ranges with seamless transitions, empowering riders to stay at the front of the group.

The Shimano GRX RD-RX820 2x12 Rear Derailleur is versatile, accommodating both 11-34T and 11-36T 12-speed cassettes, ensuring you have a generous gear range to maintain a comfortable cadence across various terrains. This 12-speed rear derailleur from Shimano GRX boasts an integrated chain stabilizer for quieter shifts and enhanced chain control when tackling rugged routes. Additionally, the chain tensioner is equipped with an ON/OFF switch, making it perfect for rides on smoother surfaces.

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  • 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
  • Maximum front chainring difference: 17T
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 36T/Min. 34T
  • Total capacity: 42T
  • Average Weight: 270g
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