Pneumatic tire

Abstract

Provided is a pneumatic tire with which uneven wear resistance can be further improved while maneuvering stability on both dry roads and wet roads is achieved. This pneumatic tire is provided with a tread part (1), a side wall part (2), and a bead part (3), wherein the tread part (1) has a center main groove (12) extending in in the tire circumference direction and a shoulder main groove (14) extending in the tire circumference direction on the outer side of the center main groove (12), a land part (23) is sectioned between the center main groove (12) and the shoulder main groove (14), the land part (23) has a plurality of lug grooves (34A) extending inward with respect to the tire width direction from the shoulder main groove (14) and ending without communicating with the center main groove (12), the ending sides of the lug grooves (34A) have curved parts (34C) that curve to one side in the tire circumference direction, and the curved parts (34C) have raised bottom parts (34D) that form level differences with the lug grooves (34A) and that are shallower than the lug grooves (34A).

Description

technical field [0001] The present invention relates to a central main groove extending in the tire circumferential direction and a shoulder main groove extending in the tire circumferential direction on the outer side of the central main groove provided on the tread portion, and dividing between these central main grooves and the shoulder main grooves. Pneumatic tire having a land portion extending in the tire circumferential direction. More specifically, it relates to a device capable of achieving both driving stability on dry roads and driving stability on wet roads in a reverse relationship by optimizing the tread pattern structure. , and can further improve the uneven wear resistance of the pneumatic tire. Background technique [0002] Pneumatic tires employ a tread pattern in which a plurality of main grooves extending in the tire circumferential direction are provided on a tread portion and a plurality of rows of land portions are defined by these main grooves (for ex...

AI Technical Summary

Problems solved by technology

[0003] However, when the number of lug grooves in the tread portion is increased, the rigidity of the tread portion decreases, and driving stability on a dry road surface decreases.

Conversely, when the number of lug grooves in the tread portion is reduced, drainage performance is reduced, and driving stability on wet roads is reduced.

As a result, the driving stability on dry roads and the driving stability on wet roads are in an antinomy relationship, and it is difficult to improve both at the same time.

[0004] In addition, when the tread portion is subdivided by main grooves or lug grooves, uneven wear tends to occur on the tread portion due to uneven rigidity.

Then, the arrangement of main grooves or lug grooves is restricted in suppressing uneven wear, so it is more difficult to improve uneven wear resistance while balancing driving stability on dry roads and driving stability on wet roads

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