Patent ID: 8448681

Claim:
A pneumatic tire comprising a plurality of turbulence generation ridges which extend on a surface of a tire side portion in a tire-radial direction and which are arranged at a pitch in a tire-circumferential direction, wherein a protrusion rising from the surface of the tire side portion is formed in the tire side portion, at least one of an inner end portion located on the innermost side, in the tire-radial direction, of each turbulence generation ridge and an outer end portion located on the outermost side, in the tire-radial direction, of each turbulence generation ridge is smoothly continuous to a surface of the protrusion, and an inner end height (H 1 ), which is a height of the inner end portion from the surface of the tire side portion, is larger than an outer end height (H 2 ), which is a height of the outer end portion from the surface of the tire side portion, and wherein adjacent ones of said ridges are separated by regions of said tire side portion that are exposed to the environment, said regions having a circumferential and radial dimension.