Pneumatic tire having a single carcass ply reinforced with metallic cords, a high ending ply, turnup and locked bead construction

A pneumatic tire comprising:

• (a) a pair of axially spaced apart annular bead cores, each bead core comprising a plurality of wraps of a single metallic filament, each bead core having a radial cross-sectional shape;
• (b) a single carcass ply reinforced with parallel metallic filament cords of a 1+5 construction, each filament having a tensile strength of at least (-2000.times.D+4400 Mpa).times.95%, where D is the filament diameter in millimeters, said single carcass ply being folded about each said bead core, said carcass ply having a main portion that extends between the bead cores and turnup portions that are folded around the bead cores, a radially outer edge of each said turnup portion being in contact with said main portion and extending to an end point 0.5 inches (12.7 mm) to 4.0 inches (101.6 mm) radially outward of the bead core, as measured along the main portion of the carcass ply of the tire;
• and
• (c) a toe guard associated with each bead core and having first and second ends wherein each end thereof is disposed directly adjacent to said carcass ply, said first end being located on the axially inner side of the main portion of the carcass ply at a location about 0.4 inches (10 mm) inches to 3.5 inches (89 mm) radially outward of the bead core as measured along the main portion of the carcass ply and said second end being located at a point ranging from substantially the axially outermost point of the bead core to a location about 3.5 inches (89 mm) radially outward of the bead core as measured along the turnup portion of the carcass ply, and wherein the first end and second end of the toe guard is a shorter radial distance from said bead core than the end point of the turnup portion of the carcass ply.