This is the distance that the ski should travel to complete the curve when it is placed on the edge. The radius of the curve therefore depends on the sidecut* of the ski, which corresponds to the widths of the ski at 3 points: tip, waist, tip.The greater the differences in width, the more the ski will be shaped, and the more it will be parabolic, the smaller the radius of the curve. The radius of the curve is important because it indicates whether the ski will be a ski made to carve, make sharp turns, with a short radius of curve, or made to keep direct track, because it will be stable in a straight line, with a longer curve radius.