| 摘要 |
<p>A pneumatic tire (1) is provided in the tread portion (2) with zigzag circumferential grooves (3) and axial grooves (4) so that a row (5R) of circumferentially arranged blocks (5) is formed on each side of each of the zigzag circumferential grooves. Each of the zigzag circumferential grooves is composed of axially inner and outer circumferential segments (6,7), arranged alternately in the tire circumferential direction, and oblique segments (8) connecting the axially inner and outer circumferential segments, whereby the zigzag circumferential groove extends in the form of a trapezoidal wave. The zigzag amplitude (K) is in a range of from 4 to 15 % of a half tread width (TW/2). The width (WG) of the zigzag circumferential groove is in a range of from 7 to 13 % of the half tread width (TW/2). The number of axial grooves connected to each of the zigzag circumferential grooves on both side thereof is in a range of from 8 to 12 when counted in a tire footprint. The axial grooves each have a groove width (WY) of from 8 to 25 % of a pitch length (Py) between an axial groove and the circumferentially adjacent axial groove.</p> |
