Shimano GRX 812 1 x 11 Speed Rear Derailleur, Black

The RX812 is specially engineered to conquer all the challenges of gravel riding, as it gives you smooth shifting performance. Whether you're riding after work with your friends or taking on an exciting new adventure, this 11-speed model has you covered. Dominate on every ride thanks to its incredibly versatile chain stabiliser which prevents chain slapping and drops as you shift. Shimano has also installed a switch stabiliser to this model, allowing you the freedom to turn it on/off based on the terrain conditions.