Shimano GRX RD-RX812 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, For 1x, 42t Low Sprocket Max

Shimano's GRX 11-speed rear derailleur brings gravel-ready performance to mixed-terrain riding. The integrated Shadow RD+ chain stabilizer with ON/OFF switch eliminates chain slap on rough surfaces while allowing you to disable it on smooth roads for lighter shifting feel. Gravel-tuned clutch tension delivers silent, precise shifting across varied conditions without chain drops.

Adjustable stabilizer prevents chain slapping and drops on rough terrain. Compatible with Shimano road Dual Control Levers, LinkGlide, and standard HG 11-speed chains. Long cage design supports 1x drivetrains with up to 42t low sprocket and 11t top sprocket.