| 摘要 |
A tire tread (11) has four deep longitudinally extending grooves (14,15,16,17), two shoulder ribs (18,22), two intermediate ribs (19,21) and a central rib (20). Each shoulder rib (18,22) is free of grooves extending laterally thereacross, while each intermediate rib (19,21) and the central rib (20) are laterally traversed by a series of shallow grooves (30,31,32) having depths (40) in the range of 10-25% of the depth (41) of the deep grooves (14,15,16,17). |
