Earthmover tire

A pneumatic tire, the tire in its unmounted and uninflated state, having a nominal bead diameter of at least 50 cm (20 inches), a carcass having a pair of bead portions, each bead portion having one annular inextensible bead and a bead flange area, the carcass further including a steel-reinforced radial ply extending between and wrapped about each bead, the ply having turn up ends extending axially and radially outwardly from each bead, and a plurality of reinforcing belts disposed radially outwardly of the ply;

• a tread disposed radially outwardly of the carcass, the tread having a net-to-gross ratio in the range of 40% to 60%;
• a pair of axially inner sidewalls disposed between the ply and the turn up end of the ply and extending from the bead portion to the reinforcing belts;
• and a pair of axially outer sidewalls extending radially inwardly from the tread along the axially outer surfaces of the carcass and the inner sidewalls toward the beads, the uninflated and unmounted tire being characterized by:
• the tread having a radially outer ground contacting surface that has a continuous curvature in the axial direction, such curvature being defined by a radius or radii less than twice the nominal bead diameter;
• the axially outer sidewalls having axially outer convex surfaces extending from the tread radially outer ground contacting surface to the bead flange area, the convex surfaces having a curvature in the radial direction, such curvature being defined by a radius or radii less than the nominal bead diameter;
• and
• the tread having axially outer convex surfaces, being an extension of the convex surface of the sidewall.