Rear Derailleur Shimano GRX RD-RX812 Top Normal 11-speed

Rear Derailleur Shimano GRX RD-RX812 Top Normal 11-speed

The Shimano GRX RD-RX812 is an 11-speed rear derailleur designed for gravel and mixed-terrain riding, featuring an integrated chain stabilizer mechanism. It delivers a quieter ride and enhanced shifting security and precision on rough terrain.

The adjustable stabilizer reduces chain slap and prevents chain drops. An ON/OFF switch allows you to engage or disengage the clutch depending on terrain – lower resistance on smooth roads and maximum stability on gravel and trails. The gravel-tuned clutch tension ensures reliable performance even on technical sections.

The RD-RX812 is compatible with MTB cassettes up to 42T and works with current road DUAL CONTROL LEVER shifters. SHIMANO SHADOW RD+ technology keeps the derailleur low-profile while improving chain control across varied surfaces.

• Use: Gravel, mixed terrain
• Series: Shimano GRX 11-speed
• Model: RD-RX812
• Speeds: 11
• Technology: SHIMANO SHADOW RD+
• Compatible cassette: 40–42T
• Compatible chain: HG-EV 11-speed / HG-X11
• Total capacity: 31T
• Pulleys: 11T
• Weight: approx. 267 g