Patent ID: 8783311

Claim:
A tire, comprising: a tread which contacts a road surface and is provided on an outer side of the carcass in a tire radial direction; side walls provided on an inner side of the tread in the tire radial direction; and a buttress portion provided between the tread and the side walls, and does not contact a smooth road surface when the road surface is smooth and a proper internal pressure and a proper load are applied to the tire, wherein a recessed shoulder region is provided on the buttress portion, the recessed shoulder region having a predetermined width and extending along the tire circumference direction, and on the recessed shoulder region, formed are a plurality of recessed portions recessed from a surface of the tire, and a surface portion where the recessed portions are not formed, the recessed portion is formed in a plurality in a tread width direction and the tire circumference direction, a ratio of an area occupied by the recessed portions in the recessed shoulder region is equal to or greater than 60%, in the surface of the tire, a width of the recessed shoulder region along the tire radial direction is represented by L 1 , and a length of the recessed shoulder region along the tire circumference direction is represented by L 2 , a volume of the recessed portions is represented by V, and a depth of a deepest portion of the recessed portions is represented by D, the relation of V≧L 1 ·L 2 ·(D/2) is satisfied, the recessed portion is polygonal on the surface of the tire, and a side forming the recessed portion is slanted in relation to the tire circumference direction, and wherein an end of the recessed portion positioned on an innermost side of the recessed shoulder region in the tread width direction is provided in a position, in the circumferential direction, that is substantially the same as a short thin groove.