| 摘要 |
<p>A pneumatic radial tire provided with a band layer consisting of a band ply formed by arranging one or a plurality of band cords on the inner side of a tread section and a radially outer side of a belt layer, and spirally coiling a tape-form, band-like ply buried in topping rubber. This band ply has an elongation resistance K (unit; N·pieces/cm), determined by the following expression, of 99 to 700, when a sectional area per piece of the band cord is S (unit; mm2), modulus at 2% elongation M (unit; N/mm2), and arrangement density of band cord per cm of width of a band ply D (unit; pieces/cm). K=S × M × D/100 --- (1)</p> |
