| 摘要 |
A pneumatic tyre comprising a tread portion (12) provided with at least one circumferential groove (8) having an axially inner groove wall (6) and an axially outer groove wall (7), characterised in that the radially outer edges (6E,7E)of the axially inner and outer groove walls (6,7) are disposed towards the tyre equator, the axially inner groove wall (6) intersecting the tread face (2) at an inclination angle (alpha) of from 25 to 45 degrees with respect to the normal line to the tread face, and the axially outer groove wall (7) intersecting the tread face (2) at an inclination angle (beta) of from O to 20 degrees with respect to the normal line to the tread face. <IMAGE> |
