| 摘要 |
<p>A pneumatic tyre for heavy duty use improved in shoulder wear resistance and wandering performance, in which a tread profile extending between tread edges (PT) is formed by an arc having an outwardly projecting convex curvature of a radius (TR),a buttress profile extending radially inwardly from a point (PB) on the surface of each tyre sidewall is formed by an arc having an inwardly projecting concave curvature of a radius (BR),a connecting profile extending between each tread edge (PT) and said point (PB) is formed by an arc having an outwardly projecting convex curvature and intersecting the tread profile at the tread edge (PT) to form a angled corner and smoothly connected with the buttress profile at the point (PB), the ratio (t/m) of the radial distance (t) between the tread edge (PT) and the equatorial point (C) on the tread profile to the axial distance (m) therebetween is 0.09 to 0.12, the ratio (m/L) of said axial distance (m) to the axial distance (L) between the equatorial point (C) and an imaginary point (PS) at which the tread arc having the radius of curvature (TR) and the buttress arc having the radius of curvature (BR) intersect each other if extended is 0.85 to 0.95, and the inclination angle ( theta ) of the tangential line (T) to the connecting profile drawn at each tread edge (PT) is 20 to 60 degrees with respect to the radial direction of the of the tyre. <IMAGE></p> |
