Patent ID: 9421829
Filing Date: 2016-08-23
CPC Classification: B60C

Claim Text:
1. A pneumatic tire comprising a plurality of circumferential main grooves extending in a tire circumferential direction, and a plurality of land portions that are partitioned and formed by the circumferential main grooves in a tread portion, wherein, when a region corresponding to 35% of a tread pattern developed width from a first tread edge is called an inner side region, a region corresponding to 35% of the tread pattern developed width from a second tread edge is called an outer side region, the left and right circumferential main grooves outermost in a tire width direction are called outermost circumferential main grooves, and the land portions on the outer side in the tire width direction partitioned and formed by the left and right outermost circumferential main grooves are called shoulder land portions, the plurality of land portions each have a plurality of sipes, not less than 90% of the sipes disposed in the inner side region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in the outer side region are constituted by three-dimensional sipes, the two-dimensional sipes having a sipe wall face with a linear form when viewed as a cross-section from a direction perpendicular to a sipe length direction, and the three-dimensional sipes having a sipe wall face with a form bending in a sipe width direction when viewed as a cross-section from a direction perpendicular to a sipe length direction, the left and right shoulder land portions each have a plurality of lug grooves arranged in the tire circumferential direction, a pitch number N a groove area ratio S a total groove area ratio S