Heavy-duty tire

A heavy-duty tire comprising;

• a carcass comprising a carcass ply extending between bead cores of bead portions via sidewall portions and a tread portion therebetween;
• a belt layer comprising at least three belt plies disposed on an outer side of the carcass in a tire radial direction and inside the tread portion;
• and
• a serration extending in a tire circumferential direction on an outer surface of a tire sidewall, the serration being formed of a plurality of radially extending ridges arranged adjacently in the tire circumferential direction,
• wherein:
• in a tire meridian section, a contour line of the outer surface of the tire sidewall includes a lower side region extending curvedly in a convex arc shape between a tire maximum width position and a bead heel,
• in each of the bead portions, a clinch rubber is disposed, and the clinch rubber includes a rising portion extending radially outwardly from a bead heel and a base portion extending axially inwardly from the bead heel to a bead toe,
• in each of the bead portions, a sidewall rubber is disposed radially outside the rising portion of a respective one of the clinch rubbers,
• the serration is divided into a plurality of serration fields in the tire circumferential direction by non-serrated portions extending obliquely,
• the rising portion is not covered by the sidewall rubber so as to be exposed at least in a region on a radially inner side in which the tire is in contact with a rim flange and forms an outer surface of a respective one of the bead portions,
• inner ends in the tire radial direction of the serration fields coincide with an inner end in the tire radial direction of the sidewall rubber,
• the inner end of the sidewall rubber covers a radially outer end of the rising portion of the clinch rubber from axially outside so as to be in direct contact with the radially outer end of the rising portion, and
• a radially innermost edge of the serration and a radially innermost edge of the sidewall rubber are arranged at the same position in the tire axial direction and in the tire radial direction.