| 摘要 |
A pneumatic tire (1) comprises a sidewall portion (2) which is provided in the outer surface with a circumferentially continuous or discontinuous serrated zone (3) in which radially extending serration ridges (4) are arranged circumferentially of the tire; the serration ridges (4) are grouped into circumferentially successively arranged groups (5) each consisting of serration ridges (4) whose angles ¸ with respect to the respective tire radial directions are different from each other and gradually increased toward one circumferential direction; each group (5) has an equally-spaced position (P) at which the serration ridges (4) are equally spaced in the tire circumferential direction. |
