Pneumatic tire

Abstract

Provided is a pneumatic tire which exhibits improved noise performance and traveling performance on unpaved roads. A center land part 11, which is defined by a pair of main grooves 10 that extend in azigzagging manner along the tire circumferential direction on both sides of a tire center line CL of a tread part 1, is subdivided into a plurality of repeating units 30 by a plurality of first shallow grooves 21 which are positioned at intervals in the tire circumferential direction so as to extend in the tire width direction and have both ends thereof connected to portions of the main grooves 10 other than bent sections 10A thereof. Each of the repeating units 30 comprises an aggregate of four blocks 31-34 that are partitioned by: a pair of second shallow grooves 22 which extend from the main grooves 10 in the tire width direction so as to converge at a single point on the tire center line CL; a third shallow groove 23 which extends from one of the pair of first shallow grooves 21 adjacent to the repeating unit 30 toward one of the pair of second shallow grooves 22; and a fourth shallow groove 24 which extends from the other of the pair of first shallow grooves 21 adjacent to the repeating unit 30 toward the other of the pair of second shallow grooves 22.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as a tire for running on unpaved roads, and more particularly, to a pneumatic tire having improved noise performance and running performance on unpaved roads. Background technique [0002] Pneumatic tires intended to run on unpaved roads such as uneven ground, muddy ground, snowy roads, sandy ground, rocky ground, etc., generally adopt a tread pattern mainly composed of horizontal grooves and blocks with many edge components and having a large groove area. In such tires, mud, snow, sand, stones, rocks, etc. (hereinafter, collectively referred to as "mud, etc.") on the road surface are bitten to obtain traction performance, and mud, etc. Running performance on unpaved roads (for example, refer to Patent Documents 1 and 2). [0003] Comparing the tires of Patent Documents 1 and 2, it can be said that the tire of Patent Document 1 has a relatively small groove area and is of the type that takes r...

AI Technical Summary

Problems solved by technology

In addition, as described above, since tires for running on unpaved roads basically have blocks as the main body and have a large groove area, there is a tendency that the noise performance (such as pattern noise) tends to be lowered, so that the noise performance is also required to be maintained or improved.

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