TIRE

An outer surface 2G of a tire 2 includes a tread surface 24 and a pair of side surfaces 26. A contour line of the tread surface 24 includes a center arc, a pair of middle arcs, a pair of side arcs, and a pair of shoulder arcs. A contour line of each side surface 26 is connected to the shoulder arc. A position, on the outer surface 2G, corresponding to a ground-contact end obtained by applying a load that is 80% of a standardized load, to the tire 2 in a standardized state, and bringing the tire 2 into contact with a flat surface is a reference ground-contact position PG, and a boundary between the shoulder arc and the side arc is a reference boundary SH. The reference boundary SH is located axially outward of the reference ground-contact position PG. A ratio of a distance L in an axial direction from an equator plane to the reference boundary SH to a distance HTW in the axial direction from the equator plane to a tread reference end TE is not less than 0.94 and not greater than 0.98.