Patent ID: 7980281

Claim:
A pneumatic tire in which a tread surface is provided with a groove portion, and a land portion divided by the groove portion, wherein a protruding stripe extending along an extending direction of the groove portion is provided in a groove bottom of the groove portion, wherein the protruding stripe is provided with a top head portion protruding toward a tire outer circumferential side, and a base portion being narrower than the top head portion and connecting the top head portion and the groove bottom, and wherein a ratio H/D of a height H of the protruding stripe with respect to a groove depth D of the groove portion satisfies the relation 0.2<H/D<0.5; the height of the protruding stripe is constant; the base portion is pinched-in while having a side surface formed in a circular arc cross sectional shape, and the side surface is smoothly connected to a side surface of the top head portion and the groove bottom; a ridge line portion in the tire outer circumferential side of the top head portion is formed by a curved surface having a circular arc cross sectional shape; the top head portion is formed in a vertically longer rectangular cross sectional shape and a top surface of the top head portion is formed by a plane surface.