Patent ID: 11951776
Assignee: THE YOKOHAMA RUBBER CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A pneumatic tire, comprising:
a tread portion extending in a tire circumferential direction and having an annular shape;
a pair of sidewall portions respectively disposed on both sides of the tread portion; and
a pair of bead portions each disposed on an inner side of the pair of sidewall portions in a tire radial direction,
the tread portion having a surface provided with a pair of main grooves on both sides of a tire equator that extend along the tire circumferential direction,
shoulder regions, positioned on an outer side in a tire width direction of the main grooves, being provided with a plurality of shoulder lug grooves that are provided at an interval in the tire circumferential direction and extend from the main grooves toward the outer side in the tire width direction, and a plurality of shoulder blocks that are defined by the main grooves and the shoulder lug grooves and are arranged along the tire circumferential direction,
side regions that are adjacent to outer sides in the tire width direction of the shoulder regions being provided with a plurality of side grooves that are extensions of the respective shoulder lug grooves and extend along the tire radial direction and a plurality of side blocks that are defined by the side grooves on the outer side in the tire width direction of each of the shoulder blocks and are raised from outer surfaces of the sidewall portions,
side surfaces of the shoulder blocks on the outer side in the tire width direction and top surfaces of the side blocks each being provided with narrow grooves extending in the tire radial direction and having groove widths narrower than groove widths of the shoulder lug grooves, the narrow grooves on the side surfaces of the shoulder blocks on the outer side in the tire width direction and on the top surfaces of the side block extending on identical straight lines,
in each of block groups including a pair of shoulder blocks adjacent to each other with a shoulder lug groove provided in between and a pair of side blocks adjacent to each other with a side groove positioned on an extension of the shoulder lug groove between the pair of shoulder blocks provided in between, contour lines of side surfaces of the shoulder blocks on the outer side in the tire width direction and along the shoulder lug groove and contour lines of the top surfaces of the side blocks and along the side groove extending on identical straight lines, wherein
of the contour lines of the top surfaces of the side blocks and extending along the side grooves, contour lines on a side away from the side groove between the pair of side blocks and contour lines of the narrow grooves formed on the side blocks each including:
straight portions extending along the tire radial direction on a side of the shoulder blocks, and
inclined portions connected to the inner side in the tire radial direction of the straight portions and extending in a converging manner toward the side groove between the pair of side blocks, and

the block groups being repeatedly arranged over an entire circumference.