Abstract: The tire 1 comprises a belt 6 and a tread surface 100, the belt 6 has: a plurality of intersecting belt layers 6a; and one or more circumferential belt layers 6b, the tread surface is provided with: a plurality of main grooves 110; a shoulder land portion 121; and an auxiliary groove 130 provided in the shoulder land portion, having a narrower width groove than the main grooves, and an outer groove wall 130a located on the outer side in the tire width direction of a pair of groove walls in the auxiliary groove is positioned either at the same tire widthwise position as an outermost end 6bg in the tire width direction of the one or more circumferential belt layers, or on the inner side in the tire width direction than the outermost end in the tire width direction of the one or more circumferential belt layers.