Abstract: An improved high flotation, low pressure radial tire, the carcass of which is formed of one or more plies of radial tire cord, one or more plies of circumferential tire cord, and one or more plies of sidewall reinforcing tire cord forming a reinforcing annulus the major diameter of which is substantially the same as the major diameter of the sidewalls and the minor diameter of which is greater than the minor diameter of the sidewalls so that the reinforcing annulus terminates well short of the tire bead.