Abstract: A radial off-road tire has a sidewall provided with a protective rib which s located substantially at or outwardly of the level of the maximum axial width of the carcass reinforcement. The geometrical characteristics of length, thickness and location of the protective rib to the rest of the wall, combined with the characteristics of meridian radius of curvature of the tread and the angle which the upper face of the sidewall makes with the direction parallel to the axis of rotation of the tire makes it possible to increase the life of the tire and minimize the rate of propagation of scratches initiated by cutting objects.