Shimano XTR M9120 crank Direct Mount chainring (chainring not included) Lighter and stiffer design Dynamic Chain Engagement – specially designed tooth profile, created for use with 1x drivetrains, keeps the chain on better even on rough terrain Hollowtech II crank construction Q-factor: 168mm Chainline: 52 mm Crank length 175 mm Weight: 539 g (with 34T chainring) Without chainring