Pneumatic tire

摘要

A pneumatic tire comprising a plurality of protector ribs 9 disposed on outer surface 3a of at least one sidewall portion 3 at intervals in the circumferential direction, each protector rib 9 projecting axially outwardly, extending at an angle α of 5 to 25° with respect to the radial direction, and including outer wall 10 extending from a radially outer edge 13 having a circumferential length L1 of 10 to 25 mm, to maximum projecting portion 14 at which thickness t1 of the rib 9 reaches a maximum, and in a meridian cross section of the tire in a normal loaded state, the outer wall 10 being parallel to flat surface M or extending from the outer edge 13 toward the maximum projecting portion 14 with inclination in a direction away from the flat surface M at an angle of at most 15° with respect to the flat surface M.

主权项

1. A pneumatic tire comprising:
a tread portion; a pair of sidewall portions extending radially inwardly from both axial ends of the tread portion; a pair of bead portions disposed at radially inner ends of the sidewall portions; and a plurality of protector ribs disposed on an outer surface of at least one of said sidewall portions at intervals in a circumferential direction of the tire, wherein each of said protector ribs projects axially outwardly from said outer surface, each of said protector ribs extends at an angle of 5 to 25 degrees with respect to a radial direction of the tire, each of said protector ribs includes a radially outer wall facing radially outward, said radially outer wall extends from a radially outer edge of the rib to a maximum projecting portion of the rib at which the rib reaches its maximum thickness, said radially outer edge of the rib has a circumferential length of 10 to 25 mm, in a meridian section of the tire in its normal loaded state in which the tire mounted on a standard rim, inflated to a normal tire pressure and loaded with a normal tire load is set on a flat horizontal surface at a camber angle of zero degrees, said radially outer wall is parallel with said flat horizontal surface or extends from said radially outer edge to said maximum projecting portion with inclination in a direction away from said flat horizontal surface at an angle of at most 15 degrees with respect to said flat horizontal surface, wherein said radially outer wall has an approximately trapezoidal shape such that a circumferential width thereof gradually decreases from said radially outer edge toward said maximum projecting portion.