Shimano GRX 810 11 Speed Gravel Single ChainsetThis terrific chainset is incredibly versatile to give you the best performance possible, wherever the road takes you. Used within a Shimano 1x11 speed drivetrain, it will help you maintain your momentum on familiar routes, while its optimised design excels on gravel and muddy surfaces. You'll benefit from its lightweight alloy construction with Hollowtech II crank arm technology, which delivers a superb balance of stiffness, strength and rotating performance.Features: Material: Alloy Use: Gravel, Road Speed: 1x11 speed Chainline: 50.1mm Compatible Chain: HG-EV 11 speed, HG-X11 Arm: 4-arm BCD: 110mm Recommended Bottom Bracket: Pressfit: SM-BB72; Threaded: SM-BBR60 Q-factor: 151mm Technologies:HG-EV: HG-EV cassette sprocket is for rider-tuned gear combination & cadence management. We provide optimal 11 speed drivetrain gear ratio; you can choice wider and closer gear combination available to match various riding disciplines. HG-EV cassette sprocket is obtained 11 speed gear without compromising the 10 speed durability and improved Hyperglide shifting.Hollowtech II: Providing the best balance of stiffness, strength, weight and rotating performance. The concept of Hollowtech II technology is focused on producing a superior crankset which will maximise a rider's power transfer. The rigidity of the crankset ensures pedalling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. Hollowtech technology is an ultra-lightweight hollow crankarm created by Shimano with the company's own proprietary forging technology that also maintains rigidity. The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedalling stability, allowing for more efficient power transfer. The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. High Precision Sealing. Moreover, Hollwotech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods. 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.