Shimano XT FC-M770/M760 Hollowtech II Crankset
To create the XT HollowTech II Crankset, Shimano incorporated the crank arms and bottom bracket into a single unit to give you increased rigidity while dropping weight. Plus, Shimano hollowed out the forged crank arms to further decrease weight without compromising the strength of this crankset for your all-terrain mountain bike. The carbon-steel composite middle ring sandwiched between aluminum inner and outer chainrings adds to the life of your XT Crankset and increases rigidity for improved shifting and power.Product FeaturesMaterial: [Arms] forged aluminum; [Inner, Outer Chainrings] aluminum; [Middle Chainring] steel & composite; [Bolts] aluminumArm Length: See options pull-down menuGearing:Bottom Bracket: IntegratedWeight: [incl. BB] 853gRecommended Use: All-mountain MTBManufacturer Warranty: 2 Years