| 摘要 |
<p>A pneumatic tyre comprises a tread portion (2) having acute-angle corners (3) each defined between two tread grooves intersecting at an acute angle ( alpha ), each of the acute-angle corners is provided with a slope (4) extending radially inwardly from the tread face, and the slope (4) is defined by a three-dimensionally convex face. Preferably, the slope is defined by a surface of a sphere, ellipsoid, hyperboloid or paraboloid. When the edges formed between the slope and walls of the two tread grooves are projected on the tyre circumferential surface and the tyre equatorial plane, each of the projected lines is an arc. <IMAGE></p> |
