A tire comprising: a tread portion, whose position when mounted on a vehicle is specified, comprising an outer tread edge (To) positioned on an outer side of the vehicle when mounted on the vehicle, an inner tread edge (Ti) positioned on an inner side of the vehicle when mounted on the vehicle, a plurality of main grooves extending continuously in a tire circumferential direction, and a plurality of land regions divided by the main grooves, wherein the main grooves consist of a first main groove whose groove edges are both positioned on a side closer to the inner tread edge (Ti) of a tire equator, a second main groove arranged between the first main groove and the inner tread edge (Ti), and a third main groove whose groove edges are both positioned between the tire equator and the outer tread edge (To) and having a width smaller than those of the first main groove and the second main groove, and the land regions consist of an inner middle land region defined as a region between the first main groove and the second main groove, an inner shoulder land region defined as a region between the second main groove and the inner tread edge (Ti), an outer shoulder land region defined as a region between the third main groove and the outer tread edge (To), and an outer middle land region defined as a region between the first main groove and the third main groove and having a width in a tire axial direction larger than that of the inner middle land region, characterized in that the width of the outer middle land region is in a range of from 1.3 to 2.5 times the width in the tire axial direction of the inner middle land region. a tread portion, whose position when mounted on a vehicle is specified, comprising an outer tread edge (To) positioned on an outer side of the vehicle when mounted on the vehicle, an inner tread edge (Ti) positioned on an inner side of the vehicle when mounted on the vehicle, a plurality of main grooves extending continuously in a tire circumferential direction, and a plurality of land regions divided by the main grooves, wherein the main grooves consist of a first main groove whose groove edges are both positioned on a side closer to the inner tread edge (Ti) of a tire equator, a second main groove arranged between the first main groove and the inner tread edge (Ti), and a third main groove whose groove edges are both positioned between the tire equator and the outer tread edge (To) and having a width smaller than those of the first main groove and the second main groove, and the land regions consist of an inner middle land region defined as a region between the first main groove and the second main groove, an inner shoulder land region defined as a region between the second main groove and the inner tread edge (Ti), an outer shoulder land region defined as a region between the third main groove and the outer tread edge (To), and an outer middle land region defined as a region between the first main groove and the third main groove and having a width in a tire axial direction larger than that of the inner middle land region, characterized in that the width of the outer middle land region is in a range of from 1.3 to 2.5 times the width in the tire axial direction of the inner middle land region.