Patent ID: 9079460
Filing Date: 2015-07-14
Classification: B60C

Abstract:
1. A pneumatic tire in which a circumferential groove extending in a tire circumferential direction is formed by land portions constituting a tread surface coming into contact with a road surface, wherein a flat groove portion and an in-groove land portion are formed in the circumferential groove, the flat groove portion being a flat surface of a groove bottom of the circumferential groove, the in-groove land portion being raised toward the tread surface side from the groove bottom of the circumferential groove, a plurality of narrow grooves extending in a tread width direction are formed in the in-groove land portion, cutout portions extending respectively from the plurality of narrow grooves in the tread width direction are formed in a corresponding one of the land portions and ending inside the land portion, wherein a width of each of the cutout portions in the tire circumferential direction is substantially equal to a width of each of the narrow grooves in the tire circumferential direction, and a width of the circumferential groove in the tread width direction is 5 to 30% of a width of the tread surface in the tread width direction, wherein a depth from a groove bottom of each of the narrow grooves to an upper surface of the in-groove land portion is 50 to 100% of a height from the groove bottom of the circumferential groove to the upper surface of the in-groove land portion.