| 摘要 |
<p>Tubeless type heavy duty low profile pneumatic radial tires are disclosed, which each comprise a radial carcass layer toroidally extending from one of beads to the other, and a belt comprising at least two plies successively closed piled on a crown portion of the carcass layer. The at least two plies have non-extensible cords arranged at a shallow angle with respect to an equatorial plane of the tire but intersecting between the plies through the tire equatorial plane. The tire uses at 15 DEG rim as a design rim thereof. When the tire is assembled into the design rim and inflated at a normal internal pressure, a shape of the carcass line in a tire radial section meets the following inequalities (1) through (4). 0.45</=H/B</=0.75 (1) (-0.12 H/B)+0.79</=l/B</=(-0.12 H/B)+0.85 (2) (0.1 H/B)+1.11</=B/J</=(0.1 H/B)+1.15 (3) 0<a/H</=0.017 (4) In the above, H, B, a, J and l are the maximum sectional height of the carcass line from a diameter line of the design rim, the maximum axial width of the carcass line, a maximum distance between a straight line which is in parallel with a rotary axis of the tire in the radial section and intersects with the carcass line at two points which are separated from each other by a distance: L=0.96B-0.77H, a width of the rim, and an axial width of a zone where the cords between the belt plies intersect with one another, respectively.</p> |
