A tire, comprising a tread surface divided into a plurality of land portions (3a, 3b, 3c) by at least one circumferential groove (2a, 2b) extending along a tire equator and tread edges, wherein at least an outline (LX, LY) on one side of the tire equator of the tread surface comprises a plurality of arcs (AR1, AR2, AR3, BR1, BR2, BR3) each having a different radius of curvature (ARc1, ARc2, ARc3, BRc1, BRc2, BRc3) in a width direction cross-sectional view of the tire; an arc having a minimum radius of curvature among the plurality of arcs (AR1, AR2, AR3, BR1, BR2, BR3) lies in a land portion having a maximum tread width direction length among the plurality of land portions (3a, 3b, 3c); an arc having a larger radius of curvature is disposed on a tread edge side of the arc having the minimum radius of curvature; the tread surface is divided into three land portions (3a, 3b, 3c) by two of the circumferential grooves (2a, 2b) and the tread edges; the tire is characterized by a central land portion located at the tread width direction center among the three land portions (3a, 3b, 3c) having a tread width direction length that is 95% to 105% of the tire width direction length of the land portion having the maximum tread width direction length; the tire width direction center of the central land portion is located within a range of 10% or less of a tire width direction length of the central land portion from a tire maximum outer diameter position of the tread surface; and the tread edge refers to a ground end when a tire is mounted on an applicable rim, filled with a prescribed internal pressure and applied with a prescribed load. a tread surface divided into a plurality of land portions (3a, 3b, 3c) by at least one circumferential groove (2a, 2b) extending along a tire equator and tread edges, wherein at least an outline (LX, LY) on one side of the tire equator of the tread surface comprises a plurality of arcs (AR1, AR2, AR3, BR1, BR2, BR3) each having a different radius of curvature (ARc1, ARc2, ARc3, BRc1, BRc2, BRc3) in a width direction cross-sectional view of the tire; an arc having a minimum radius of curvature among the plurality of arcs (AR1, AR2, AR3, BR1, BR2, BR3) lies in a land portion having a maximum tread width direction length among the plurality of land portions (3a, 3b, 3c); an arc having a larger radius of curvature is disposed on a tread edge side of the arc having the minimum radius of curvature; the tread surface is divided into three land portions (3a, 3b, 3c) by two of the circumferential grooves (2a, 2b) and the tread edges; the tire is characterized by a central land portion located at the tread width direction center among the three land portions (3a, 3b, 3c) having a tread width direction length that is 95% to 105% of the tire width direction length of the land portion having the maximum tread width direction length; the tire width direction center of the central land portion is located within a range of 10% or less of a tire width direction length of the central land portion from a tire maximum outer diameter position of the tread surface; and the tread edge refers to a ground end when a tire is mounted on an applicable rim, filled with a prescribed internal pressure and applied with a prescribed load.