Shimano GRX 810 2x11sp Rear DerailleurThis solid rear mech is engineered to give you silent and uninterrupted rear shifting on rough gravel terrain. It features an adjustable chain stabiliser which prevents chain slapping and drops, so you can enjoy smoother and more reliable mixed surface shifting. Fully equipped to take on the harsher of road conditions, its toggle clutch and switch stabiliser can be turned on and off to match the terrain. Features:   Use: Gravel, Road     Speed: 2x11 speed Compatible Chain: HG-EV 11 speed; HG-X11  Link Bushings: 4 fluoric coated link bushings  Low Sprocket Max: 34T  Low Sprocket Min: 30T  Max Front Difference: 17T  Pulley Teeth: 13T  Top Sprocket Max: 11T  Top Sprocket Min: 11T  Total Capacity: 40T  Spring Type: Shimano Shadow RD+ Technologies:Shimano Index System: Every Shimano equipped multi-gear bicycle includes Shimano S.I.S - Shimano Indexed Shifting. It's the technology behind that "click" you hear and feel every time you shift through your gears. That "click" captures the light, precise, and consistent shifting bikes equipped with Shimano deliver. It's the sound of perfect gear changes, of levers directing derailleurs in harmony and the feeling that resonates into your hand, letting you know that your commands are being answered.Shimano Shadow RD+: Less distraction quiet drive train. Rear derailleur stabiliser reduces chain slap. A simple solution for chain drop. Lighter and more efficient than roller type chain device. A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.