Patent ID: 7234495

Claim:
An underground mine tire having a nominal bead diameter of 20.0 inches or less comprises: a carcass having at least one radial steel cord reinforced ply; a belt reinforcing structure having four belt layers, a radially inner first layer, a second layer, a third layer and a radially outer fourth layer, wherein the first, second and third layers have steel cords having cord diameters of 0.06 inch or greater, the steel cords being spaced at 8 ends per inch or less and the radially outer fourth layer has steel cords having a cord diameter of 0.04 inch or less, the steel cords being spaced at 12 ends per inch or more; a tread; a pair of rubber sidewalls extending along the carcass below the tread, and wherein the tire has a nominal bead width greater than 8.50 inches and an overall diameter of less than 55 inches.