| 摘要 |
1. A pneumatic tyre tread with grooves on its road-touching section including one central, straight, circumferential groove and two side, straight, circumferential grooves from which single transverse grooves come out alternately or non-alternately crosswise. In the tread shoulder section there is one shoulder, straight, circumferential groove and one decorative, straight, circumferential groove from which radial grooves come out to meet the transverse grooves. The distance (y) between the side, circumferential grooves (B) equals 71+-3% of a theoretical width (x) of the tread face while the width (b) of the side, circumferential grooves (B) is smaller or bigger than the width (a) of the central, circumferential groove (A) by 25+-6%. The transverse grooves (D) terminated with widenings (3) form the angle of 60+-5 degrees with the circumferential grooves (A) and (B). The widenings (3) of the transverse grooves (D) form a circumferential ring in width (d) situated right in the middle between the central groove (A) and the side groove (B). The shoulder, straight, circumferential groove (E) forms an off-set (e) on the shoulder side wall. The radial grooves (C) form the angle of 60+-5 to 90 degrees.<IMAGE>
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