The tire has a lateral groove (4) that is arranged in positive profile limiting circumferential grooves (2,3), and whose ends are located within the positive profile. The lateral groove has a straight running base groove (5) with specific width in inner region and in outer region between the boundary edges and the base of the groove. A base groove wall (5b) extends in the radial direction through a base groove wall (5a), so that groove walls (3c,6,7) formed by common edges at different radial levels proceed between the base groove walls.
