4130 trapezoid heat treated tubular chromoly crank arms. Trapezoid shape helps reduce flex while still offering a grindable surface. Wrap-welded pedal bosses. RHD and LHD compatible sprocket bosses. Available in 165170 and 175mm lengths. 8 spline pinch bol
        
    
4130 trapezoid heat treated tubular chromoly crank arms. Trapezoid shape helps reduce flex while still offering a grindable surface. Wrap-welded pedal bosses. RHD and LHD compatible sprocket bosses. Available in 165170 and 175mm lengths. 8 spline pinch bolt style interface
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