A tire comprising: a pair of beads; a carcass extending on and between the pair of beads; a pair of sidewalls located axially outward of the carcass; a tread located radially outward of the carcass; and a belt located between the carcass and the tread, wherein an outer surface of the tire includes a tread surface configured to come into contact with a road surface, and a pair of side surfaces connected to the tread surface, the tread surface includes an equator that is a point of intersection with an equator plane, each of the side surfaces includes a maximum width position at which the tire has a maximum width, in a meridian cross-section of the tire, a contour line of the tread surface includes a plurality of arcs aligned in an axial direction, the plurality of arcs include a center arc passing through the equator, a pair of middle arcs connected to the center arc, a pair of side arcs connected to the middle arcs, respectively, and a pair of shoulder arcs connected to the side arcs, respectively, contour lines of the pair of side surfaces are connected to the pair of shoulder arcs, respectively, a point of intersection of a tangent line tangent to the shoulder arc at a first end of the shoulder arc and a tangent line tangent to the shoulder arc at a second end of the shoulder arc is a tread reference end, a ground-contact end obtained by fitting the tire onto a standardized rim, adjusting an internal pressure of the tire to a standardized internal pressure, applying a load that is 80% of a standardized load, to the tire, and bringing the tire into contact with a flat surface is a reference ground-contact end, a position, on the outer surface of the tire, corresponding to the reference ground-contact end is a reference ground-contact position, a boundary between the shoulder arc and the side arc is a reference boundary, the reference boundary is located axially outward of the reference ground-contact position, and characterized in that a ratio (L/HTW) of a distance in the axial direction from the equator plane to the reference boundary to a distance in the axial direction from the equator plane to the tread reference end is not less than 0.94 and not greater than 0.98; and a ratio (t/HTW) of a distance (t) in a radial direction from the equator to the reference ground-contact position to the distance in the axial direction from the equator plane to the tread reference end is not less than 0.06 and not greater than 0.15. a pair of beads; a carcass extending on and between the pair of beads; a pair of sidewalls located axially outward of the carcass; a tread located radially outward of the carcass; and a belt located between the carcass and the tread, wherein an outer surface of the tire includes a tread surface configured to come into contact with a road surface, and a pair of side surfaces connected to the tread surface, the tread surface includes an equator that is a point of intersection with an equator plane, each of the side surfaces includes a maximum width position at which the tire has a maximum width, in a meridian cross-section of the tire, a contour line of the tread surface includes a plurality of arcs aligned in an axial direction, the plurality of arcs include a center arc passing through the equator, a pair of middle arcs connected to the center arc, a pair of side arcs connected to the middle arcs, respectively, and a pair of shoulder arcs connected to the side arcs, respectively, contour lines of the pair of side surfaces are connected to the pair of shoulder arcs, respectively, a point of intersection of a tangent line tangent to the shoulder arc at a first end of the shoulder arc and a tangent line tangent to the shoulder arc at a second end of the shoulder arc is a tread reference end, a ground-contact end obtained by fitting the tire onto a standardized rim, adjusting an internal pressure of the tire to a standardized internal pressure, applying a load that is 80% of a standardized load, to the tire, and bringing the tire into contact with a flat surface is a reference ground-contact end, a position, on the outer surface of the tire, corresponding to the reference ground-contact end is a reference ground-contact position, a boundary between the shoulder arc and the side arc is a reference boundary, the reference boundary is located axially outward of the reference ground-contact position, and a ratio (L/HTW) of a distance in the axial direction from the equator plane to the reference boundary to a distance in the axial direction from the equator plane to the tread reference end is not less than 0.94 and not greater than 0.98; and a ratio (t/HTW) of a distance (t) in a radial direction from the equator to the reference ground-contact position to the distance in the axial direction from the equator plane to the tread reference end is not less than 0.06 and not greater than 0.15.