| 摘要 |
<p>A pneumatic tire having improved steering stability and drainage property comprises a tread (2) divided into two tread parts (3, 4) at a center (1) of a tread pattern, and a plurality of main grooves (12a, 12b) arranged in each of these tread parts, each of which main grooves being comprised of a steep slope segment (6a, 6b), a bending segment (7a, 7b) and a gentle slope segment (8a, 8b). The main grooves comprises a group of first main grooves (12a) and a group of second main grooves (12b), in which the steep slope segment (6b) and gentle slope segment (8b) of the second main groove (12b) are substantially in parallel with those (6a, 8a) of the first main groove (12a). Further, a zone (16) of a land portion (15) located between the steep slope segments (6a, 6b) of these main grooves (12a, 12b) is relatively narrow in land width as measured in a direction perpendicular to the first main grooves (12a) as compared with a zone (17) of the land portion (15) located between the gentle slope segments (8a, 8b) of the main grooves, and a surface height of the zone (16) of the land portion located between the steep slope segments (6a, 6b) is gradually decreased toward the pattern center (1). <IMAGE></p> |
