Shimano GRX 400 10sp Rear DerailleurThis top-quality rear mech is perfect for gravel riding as it provides you with silent and uninterrupted rear shifting on rough terrain. Featuring an adjustable chain stabiliser, the RX400 prevents chain slapping and drops when riding over harsh surfaces. Whether you're riding after work with your buddies or taking your road exploration further, its switch stabiliser lets you turn it on/off based on the terrain.  Wider Range Gravel ShiftingSmooth and reliable for mixed surface shifting, its gravel-tuned clutch tension helps you get the best experience out of every ride. Shimano has also developed its design specially for gravel bikes by allowing for a wider range that's suitable for use with larger sized tyres. Taking your riding a step further, you'll also benefit from this highly-efficient model's industry-leading technologies keeping you in control. Behind the "click" you hear and feel every time you shift, its Shimano Index Shifting System technology provides you with light, precise and consistent gear changes.Features:  Use: Gravel, Road Speed: 10 speed  Compatible Chain: HG-X 10 speed   Link Bushings:  4 fluoric coated link bushings   Low Sprocket Max: 36T   Low Sprocket Min: 32T   Max Front Difference: 16T   Top Sprocket Max: 11T   Top Sprocket Min: 11T    Total Capacity: 41T Pulley Teeth: 11T Spring Type: Shimano Shadow RD+ Technologies:  Shimano Index System: It's the technology behind that "click" you hear and feel everytime 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 resonate into your hand, letting you know that your commands are being answered.   Shadow RD+: Less distraction quiet drive train. Rear derailleur stabilizer reduces chain slap. 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.