A tire comprising a tread portion having a ground contact surface , the tread portion comprising a lateral groove extending in a tire axial direction, the lateral groove having a first groove wall and a second groove wall opposing each other, at least one first recess formed by partially recessing the first groove wall , and at least one second recess formed by partially recessing the second groove wall , wherein a depth (d1, d2) of each of the first recess and the second recess from the ground contact surface is less than a groove depth (D1) of the lateral groove , wherein the first recess comprises, in the ground contact surface , a first opening disposed at the first groove wall , and a first end portion extending substantially parallel to the first opening at a position farthest from the first opening , wherein the second recess comprises, in the ground contact surface , a second opening disposed at the second groove wall , and a second end portion extending substantially parallel to the second opening at a position farthest from the second opening , wherein the first end portion and the second end portion are disposed so as not to oppose each other through the lateral groove , wherein the first recess has a first bottom surface that defines an inner side in a tire radial direction, wherein the first bottom surface comprises a parallel surface that is substantially parallel to the ground contact surface , characterized in that a groove width (W1) of the lateral groove at a portion inward of the first bottom surface in the tire radial direction is greater than a groove width (W2) at a depth (d3, d4) position of the first bottom surface . a tread portion having a ground contact surface , the tread portion comprising a lateral groove extending in a tire axial direction, the lateral groove having a first groove wall and a second groove wall opposing each other, at least one first recess formed by partially recessing the first groove wall , and at least one second recess formed by partially recessing the second groove wall , wherein a depth (d1, d2) of each of the first recess and the second recess from the ground contact surface is less than a groove depth (D1) of the lateral groove , wherein the first recess comprises, in the ground contact surface , a first opening disposed at the first groove wall , and a first end portion extending substantially parallel to the first opening at a position farthest from the first opening , wherein the second recess comprises, in the ground contact surface , a second opening disposed at the second groove wall , and a second end portion extending substantially parallel to the second opening at a position farthest from the second opening , wherein the first end portion and the second end portion are disposed so as not to oppose each other through the lateral groove , wherein the first recess has a first bottom surface that defines an inner side in a tire radial direction, wherein the first bottom surface comprises a parallel surface that is substantially parallel to the ground contact surface , characterized in that a groove width (W1) of the lateral groove at a portion inward of the first bottom surface in the tire radial direction is greater than a groove width (W2) at a depth (d3, d4) position of the first bottom surface . <EOS>