| 摘要 |
PURPOSE:To lower the rigidity of a pattern without cut-in parts being visualized, by forming put-in parts in the wall surface of each tire radial groove of the pattern only on the forward side in the tire rotating direction so that the wall surface is vertically divided. CONSTITUTION:A plurality of main grooves 1 directed in the tire circumferential direction E-E and grooves 2 directed in the tire radial direction are obliquely crossed with each other so as to form a plurality of blocks 3. Of the forward and rear wall surfaces, in the tire rotating direction R, which define each tire radial groove 2, the forward one is formed therein with a suitable number of cut-in parts 4 which vertically divide the wall surface. With this arrangement, the presence of the cut-in parts 4 is not externally visualized but the rigidity of the forward end, in the rotating direction, of each block, rug or the like of the tread pattern may be lowered. Accordingly, it is possible to attain the reduction of tire noise without the control stability of the tire and the like being deteriorated. |
