A tire comprising: a tread portion provided with a shoulder circumferential groove extending continuously in the tire circumferential direction, and a crown circumferential groove extending in the tire circumferential direction, and adjacently to the shoulder circumferential groove, and a plurality of middle lateral grooves extending between the shoulder circumferential groove and the crown circumferential groove, the shoulder circumferential groove extending zigzag and comprising first inclined portions inclined with respect to the tire circumferential direction, and each of the middle lateral grooves comprising an axially outer part connected to the shoulder circumferential groove, an axially inner part connected to the crown circumferential groove, and an in-between part connecting between the axially outer part and the axially inner part, wherein the axially outer part and the axially inner part are inclined in the same direction as the first inclined portions with respect to the tire axial direction, and the groove width WA1 in the tire circumferential direction measured at the axially outer end of the axially outer part is larger than the groove width WA2 in the tire circumferential direction measured at the axially inner end of the axially outer part, wherein the axially outer parts of the middle lateral grooves are smoothly continuous with the respective first inclined portions of the shoulder circumferential groove, wherein the expression "smoothly continuous" means that the intersection angle (α1) between the groove center line of the first inclined portion and a virtual line obtained by extending the groove center line of the axially outer part toward the first inclined portion, is not more than 10 degrees, characterized in that the in-between part is inclined in the opposite direction to the axially outer part and the axially inner part with respect to the tire axial direction, and the groove width WB1 in the tire circumferential direction measured at the axially outer end of the axially inner part is larger than the groove width in the tire circumferential direction measured at the axially inner end of the axially inner part. a tread portion provided with a shoulder circumferential groove extending continuously in the tire circumferential direction, and a crown circumferential groove extending in the tire circumferential direction, and adjacently to the shoulder circumferential groove, and a plurality of middle lateral grooves extending between the shoulder circumferential groove and the crown circumferential groove, a shoulder circumferential groove extending continuously in the tire circumferential direction, and a crown circumferential groove extending in the tire circumferential direction, and adjacently to the shoulder circumferential groove, and a plurality of middle lateral grooves extending between the shoulder circumferential groove and the crown circumferential groove, the shoulder circumferential groove extending zigzag and comprising first inclined portions inclined with respect to the tire circumferential direction, and each of the middle lateral grooves comprising an axially outer part connected to the shoulder circumferential groove, an axially inner part connected to the crown circumferential groove, and an in-between part connecting between the axially outer part and the axially inner part, the axially outer part and the axially inner part are inclined in the same direction as the first inclined portions with respect to the tire axial direction, and the groove width WA1 in the tire circumferential direction measured at the axially outer end of the axially outer part is larger than the groove width WA2 in the tire circumferential direction measured at the axially inner end of the axially outer part, the in-between part is inclined in the opposite direction to the axially outer part and the axially inner part with respect to the tire axial direction, and the groove width WB1 in the tire circumferential direction measured at the axially outer end of the axially inner part is larger than the groove width in the tire circumferential direction measured at the axially inner end of the axially inner part.