| 摘要 |
<p>A pneumatic tyre comprises a central longitudinal groove (3a) in a tread crown region (Cr) and an outer longitudinal groove (3b) in each tread shoulder region (Sh), the longitudinal grooves (3a,3b) are crossed by lateral grooves (4) to form crossings (6,10) and to define blocks (5a,5b) on each side of each longitudinal groove (3a,3b), the outer longitudinal grooves being provided near the crossings with tie-bars (7), the length (Tc) of each of which is 10 to 40 % of the average length (Bc) of the longitudinal edges of two blocks axially adjacent to the tie-bar (7), each length measured along the longitudinal groove. Preferably, the lateral grooves (4) in the crown region (Cr) are provided near the crossings with tie-bars (10), the length (Ta) of each of which is 10 to 40 % of the average length (Bc) of the lateral edges of two blocks circumferentially adjacent to the tie-bar (10), each length measured along the lateral groove. <IMAGE></p> |
