Patent ID: 8726957

Claim:
A pneumatic tire comprising: a pair of bead portions; sidewall portions extending from the respective bead portions outward in a radial direction of the tire; a shoulder portion; a tread portion connected to an outer side of the sidewall portion in the radial direction of the tire via the shoulder portion; and an extension block group comprised of a plurality of extension blocks comprising first, second, and third extension blocks extending from at least the shoulder portion to the sidewall portion, said first extension block having a cross section height h 1 exceeding ½ of a tire cross section height H measured from a tire equator point CP which is an intersection point between a tread contour of the tread portion and a tire equator C defined in a tire meridian cross section, said second extension block having a cross section height from the equator point CP which is lower than the cross section height of the first extension block, said third extension block having a cross section height from the tire equator point CP which is lower than the cross section height of the first extension block, and greater than the cross section height of the second extension block, wherein ends of the first, second, and third extension blocks extending toward respective bead portions are branched, and wherein a land height of each of the extension blocks disposed in the shoulder portion is gradually reduced to the sidewall portion.