Pneumatic tire

Abstract

PROBLEM TO BE SOLVED: To restrain heel-and-toe wear of a shoulder land part.SOLUTION: A pair of shoulder circumferential grooves 3 extending in a circumferential direction on a side nearest a grounding end (e) is formed on a tread part 2. An inner lug groove 8 extending axially outward from the shoulder circumferential groove 3 and terminated in this side of the grounding end (e), an outer lug groove 9 at least extending axially inward from the grounding end (e), and an intermediate slot 10 extending in a tire axial direction between the inner lug groove 8 and the outer lug groove 9 are formed at the shoulder land part 5 between the shoulder circumferential groove 3 and the grounding end (e). An inner end in the tire axial direction of the intermediate slot 10 is terminated on an inner side more than an outer end in the tire axial direction of the inner lug groove 8, and the outer end in the tire axial direction is terminated on an outer side more than the inner end of tire axial direction of the outer lug groove 9 without reaching the ground end (e). The shoulder land part 5 continues in the circumferential direction.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of maintaining drainage performance and improving noise suppression performance by suppressing heel-toe wear in a shoulder land portion. Background technique [0002] Among pneumatic tires, passenger car tires are required to have superior quietness. In general, one of the causes of tire running noise is heel toe wear on the land portion of the tread. Heel-toe wear is a type of uneven wear that greatly wears down the press-in side (heel side) or push-out side (toe side) of the tread land portion due to shear forces acting on the tread land portion during driving and braking. side). [0003] The pattern rigidity of the tire is not uniform in the circumferential direction due to the torque converter arrangement or unavoidable non-circularity in manufacture. Therefore, there is a tendency to promote the development of long heel toe wear at a partial position in the tire circumferential direction...

AI Technical Summary

Problems solved by technology

However, the pneumatic tire with a rib pattern cannot maintain sufficient drainage performance, and there is a disadvantage that the driving force and braking force are significantly reduced on icy roads or wet roads with a small road surface friction coefficient.

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