Shimano GRX 810 11 Speed Gravel Double ChainsetThis reliable chainset is designed for gravel use as it helps you achieve a powerful pedal stroke performance. Ready to conquer every rough road, gravel path and muddy situation, the GRX 810 delivers immense acceleration and momentum. It features chainrings use gear ratios which preserve your riding rhythm over harsh surfaces with wider tyres, so you can get the most out of every ride.Lightweight and Powerful Gravel CranksetThis durable model is constructed from a tough alloy which offers excellent resistance against stones and debris which can come with a long ride across mixed-terrain. Lightweight and incredibly versatile, you'll enjoy fast acceleration and maximum power transfer when shifting for an overall superior pedalling experience.No stranger to showing off the most impressive industry-leading technologies, this stunning example uses Hollowtech II crank arm technology to boost your gravel riding performance. This technology integrates your bottom bracket axle with its right crank arm for more stiffness and weight savings to achieve a highly efficient balance. Features: Material: Alloy Use: Gravel, Road Chainline: 46.9mm Chainring Combination: 48/31T Compatible Chain: HG-EV 11 speed, HG-X11 Arm: 4-arm BCD: 110/80mm Recommended Bottom Bracket: Pressfit: SM-BB72; Threaded: SM-BBR60 Q-factor: 151mmTechnologies: 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 maximize a rider's power transfer. The rigidity of the crankset ensures pedaling 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. 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.