This superb model is manufactured to reach Shimano's ultimate goal of giving you the ultimate riding experience. in addition, its boost chainset spacing is perfect for use with your plus size rear axle standard. Stiff 1x 11 Drivetrain The stiff & smooth 11-speed crankset works effortlessly with the XT M800 11-speed cassette, with gear combinations that are rider-tuned. The gear ratios have been designed to ride efficiently for everyone's needs. The redesigned side swing derailleur is dialled for perfect shifting. Impressive Gearing System Whether you're riding uphill or looking for a more aggressive ride the gears have been tuned to maximise traction & deliver a tough, reliable, & fast performance.