Abstract: A pneumatic tire designed for use on paved road or dirt surfaces comprises a pair of annular tensile members, first and second carcass plies, a tread, and a pair of sidewalls extending between each annular tensile member and the tread. The plies from an angle between 20 degrees and 30 degrees with the tire's equatorial plane, the first ply having an substantially equal but opposite orientation from that of the second ply. The tread has a single radius of curvature in the axial direction. The tread radius is within .+-.2 inches of a radius defined by the following formula:DR=1747.29-337.967(OD)+16.4798(OD).sup.2 -0.0076(AN).sup.2where DR is the normally inflated design radius in inches of the normally inflated tire, OD is the tire's outside diameter measured in inches, and AN is the cord angle of the carcass plies measured in degrees. The tire has an aspect ratio of less than 50%.

Abstract: A radial ply aircraft tire (11) is mounted upon an H-type rim (10) which was originally designated for use with a bias ply aircraft tire. The ratio of the axial distance (WBF) between the rim flanges to the maximum cross-sectional width (CSWR) of the tire is in the range of 0.7 to 0.9. The ratio of footprint width to footprint length for the tire is in the range of 0.45 to 0.65. Preferably, the carcass (12) and the belts (14) are reinforced with aramid cords. A line (T) which is tangent to a carcass ply (12) and passes through the center of a bead (13) is inclined at an angle (.alpha.) of greater than 60.degree. with respect to the tire's axis of rotation.