Shimano Grx Rx820 12-Speed Rear Derailleur Black, 2X12-Speed

The Shimano GRX RX820 12-Speed Rear Derailleur delivers quiet, stable shifting as we ride over mixed-terrain on our 12-speed GRX gravel drivetrain. Shimano’s Quiet and Secure technology creates a low-profile design, reduces chain slap, and improves chain retention, while the ON/OFF stabilizer switch matches the terrain for optimal performance.

• Optimized for 12-speed road and gravel cycling, the GRX RD-RX820 Rear Derailleur delivers precise, reliable shifting across a wide gear range of 11-34t and 11-36t cassettes for versatile terrain handling.
• Constructed with materials and 's advanced engineering, this derailleur features an integrated chain stabilizer and Shadow Plus technology for ultra-quiet operation, reduced chain slap, and enhanced chain security on rough or mixed surfaces.
• Equipped with 's direct mount and compatible with HG 12-speed chains, the RD-RX820 offers seamless integration with GRX components, ensuring smooth performance and effortless gear transitions even under demanding riding conditions.
• Designed for durability and versatility, the derailleur's adjustable ON/OFF stabilizer switch allows riders to optimize performance on different surfaces, from smooth pavement to rugged gravel, making it ideal for adventure and gravel cyclists.
• Featuring sleek, functional styling with a low-profile Shadow Plus design, this rear derailleur minimizes distraction and enhances bike aesthetics, providing a high-performance solution for gravel, touring, and endurance riders seeking reliable, maintenance-free shifting.