A tire comprising a tread configured to come into contact with a road surface, wherein an outer surface of the tire comprises a tread surface and a pair of side surfaces continuous with ends of the tread surface, wherein, on a meridian cross-section of the tire, a contour of the tread surface comprises a plurality of curved contour lines formed as arcs having different radii, wherein a contour of the outer surface of the tire comprises, in each of end portions of the tread surface, a curved line portion that is formed as a curved contour line connected to a corresponding one of the side surfaces and is formed as an arc having a smallest radius among the plurality of curved contour lines included in the contour of the tread surface, an inner adjacent contour line disposed inwardly of the curved line portion in an axial direction in contact with the curved line portion, and an outer adjacent contour line disposed outwardly of the curved line portion in the axial direction in contact with the curved line portion, wherein a tread reference end (Pe) is an intersection point of the outer surface of the tire, and a straight line extending in a radial direction through an intersection point of a line tangent to the curved line portion at a contact point at which the inner adjacent contour line and the curved line portion are in contact with each other, and a line tangent to the curved line portion at a contact point at which the outer adjacent contour line and the curved line portion are in contact with each other, wherein an axial distance from an equator plane to the tread reference end (Pe) is a tread half-width, wherein the tread comprises a cap layer forming a part of the outer surface of the tire, an intermediate layer disposed inwardly of the cap layer in the radial direction, and a base layer disposed inwardly of the intermediate layer in the radial direction, and wherein a loss tangent (LTm) of the intermediate layer at 30°C is less than a loss tangent (LTc) of the cap layer at 30°C, and a loss tangent (LTb) of the base layer at 30°C is less than the loss tangent (LTm) of the intermediate layer at 30°C, characterized in that an outer end of the cap layer is disposed outwardly of an outer end of the base layer in the axial direction, and a position of the outer end of the cap layer coincides with a position of the outer end of the base layer in the radial direction, or the outer end of the cap layer is disposed inwardly of the outer end of the base layer in the radial direction. a tread configured to come into contact with a road surface, wherein an outer surface of the tire comprises a tread surface and a pair of side surfaces continuous with ends of the tread surface, wherein, on a meridian cross-section of the tire, a contour of the tread surface comprises a plurality of curved contour lines formed as arcs having different radii, wherein a contour of the outer surface of the tire comprises, in each of end portions of the tread surface, a curved line portion that is formed as a curved contour line connected to a corresponding one of the side surfaces and is formed as an arc having a smallest radius among the plurality of curved contour lines included in the contour of the tread surface, an inner adjacent contour line disposed inwardly of the curved line portion in an axial direction in contact with the curved line portion, and an outer adjacent contour line disposed outwardly of the curved line portion in the axial direction in contact with the curved line portion, wherein a tread reference end (Pe) is an intersection point of the outer surface of the tire, and a straight line extending in a radial direction through an intersection point of a line tangent to the curved line portion at a contact point at which the inner adjacent contour line and the curved line portion are in contact with each other, and a line tangent to the curved line portion at a contact point at which the outer adjacent contour line and the curved line portion are in contact with each other, wherein an axial distance from an equator plane to the tread reference end (Pe) is a tread half-width, wherein the tread comprises a cap layer forming a part of the outer surface of the tire, an intermediate layer disposed inwardly of the cap layer in the radial direction, and a base layer disposed inwardly of the intermediate layer in the radial direction, and wherein a loss tangent (LTm) of the intermediate layer at 30°C is less than a loss tangent (LTc) of the cap layer at 30°C, and a loss tangent (LTb) of the base layer at 30°C is less than the loss tangent (LTm) of the intermediate layer at 30°C, characterized in that an outer end of the cap layer is disposed outwardly of an outer end of the base layer in the axial direction, and a position of the outer end of the cap layer coincides with a position of the outer end of the base layer in the radial direction, or the outer end of the cap layer is disposed inwardly of the outer end of the base layer in the radial direction.