pneumatic tires

Abstract

The rigidity of the land portion is ensured while improving the contact with the ground on the axial center side of the land portion. [Solution] A pneumatic tire having a tread, wherein the tread has a first main groove 21 extending along the tire circumferential direction, a second main groove 23 provided further outward in the tire axial direction than the first main groove 21 and extending along the tire circumferential direction, and a land portion 40 partitioned by the first main groove 21 and the second main groove 23, wherein the land portion 40 has a first groove 41 communicating with the second main groove 23 and extending inward in the tire axial direction, and a second groove 42 communicating with the first groove 41, provided at a position overlapping with the tire axial central portion of the land portion 40, extending while inclined inward in the tire axial direction toward one side in the tire circumferential direction, and further communicating with the first main groove 21.

Claims

[Claim 1] A pneumatic tire having a tread, The aforementioned tread is A first main groove extending along the circumferential direction of the tire, A second main groove is provided further outward in the tire axial direction than the first main groove and extends along the tire circumferential direction, The land area is partitioned by the first main groove and the second main groove, The aforementioned land area is, A first groove that communicates with the second main groove and extends inward toward the axial direction of the tire, A second groove is provided that communicates with the first groove, is located at a position that overlaps with the axial center of the land portion, extends inclined inward in the axial direction of the tire toward one side in the circumferential direction of the tire, and further communicates with the first main groove, A pneumatic tire. [Claim 2] The pneumatic tire according to claim 1, wherein the second groove has a recess in the region of the second groove that is recessed toward the radially inward direction of the tire. [Claim 3] The pneumatic tire according to claim 2, wherein the recess is not in communication with the first main groove. [Claim 4] A groove bottom sipe is provided at the bottom of the first groove. The pneumatic tire according to claim 2, wherein the groove bottom sipe is provided in a position that does not overlap with the recess in the tire circumferential direction. [Claim 5] The pneumatic tire according to claim 4, wherein the depth of the groove bottom sipe at the outer end of the groove bottom sipe in the tire axial direction is less than the depth of the deepest part of the groove bottom sipe. [Claim 6] The pneumatic tire according to claim 1, wherein the first groove is not in communication with the first main groove. [Claim 7] The first groove has a widened portion in the middle of the tire axial direction of the first groove, which is wider than the other portions of the first groove. The pneumatic tire according to claim 1, wherein the second groove is in communication with the widened portion. [Claim 8] The pneumatic tire according to claim 1, wherein the second groove has a region in which the groove width of the second groove increases as it moves toward the first groove.

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