A ski which when it is flat on a horizontal plane, and loaded at its waist in such a way that the edges touch said horizontal plane at the waist, has a side cut extending between the front and rear contact lines; when it is pivoted around its longitudinal axis and tilted by a non-zero angle α relative to said horizontal plane, and loaded at its waist in such a way that one of the edges touches said plane at the waist, has a side cut extending between two end contact points, front and rear respectively wherein for a tilt (α) equal to 35°, the ratio of the distance (Dα) separating the front end contact point and the front contact line, related to the distance (D) separating the mid-point (9) of the shoe and the front contact line, is more than 12%.