The Shimano Tiagra FC-R4000 crank embodies the DNA of Shimano's high-end road designs delivering an ideal balance of weight and efficiency without compromising stiffness. Purpose-built for road cycling it is available in chainring and crank arm length options for rider preference.Embodies the DNA of Shimano's high-end road designs delivering an ideal balance of weight and efficiency without compromising stiffnessDurable anodized aluminum crank arms with a 24mm steel crank spindleLightweight anodized aluminum outer and inner chainringsDesigned for road set ups with 43.5mm chainline and 150 Q-Factor