| 摘要 |
<p>A pneumatic radial tire (1) including a carcass ply (3) having cords (4) embedded therein and arranged perpendicular to the equatorial plane (5) of the tire, and a belt layer (11) including at least one belt ply (12, 13) having cords (16, 17) embedded therein, said cords being disposed radially outside of said carcass, arranged substantially parallel to equatorial plane of the tire and in a wavy or zigzag form, at least those located at widthwise outermost locations in the parallel belt ply satisfying the following expression: d x a/ lambda <2> </= 0.005 and the cords in said parallel belt ply satisfying the following expression: a/ lambda </=0. 1 wherein d is the filament diameter of the cords, lambda is the wavelength of the wavy or zigzag form, and a is the half wavelength amplitude of the form. Further, cords (26, 27) inclined at an angle of 10 to 50 degrees with respect to the equatorial plane of the tire are embedded in an inclined belt ply (14, 15) provided radially outside the carcass, thereby increasing the internal shearing rigidity of the belt layer and increasing the cornering power.</p> |
