Tire

A tire comprising:

• a pair of beads;
• a carcass that bridges between the pair of beads;
• a tread that is positioned radially outside the carcass;
• a band that is positioned between the carcass and the tread;
• an outer surface having a tread surface that is in contact with a road surface, and a pair of side surfaces that are continuous with the tread surface,
• a pair of sidewalls that are positioned axially outside the carcass;
• and
• a pair of clinches that are positioned radially inside the sidewall,
• wherein the tread includes the tread surface,
• the tread surface includes an equator that is an intersection point with an equatorial plane,
• the band includes a band cord that extends substantially in a circumferential direction,
• the band includes a center portion that intersects with the equatorial plane, and a pair of side portions that are positioned axially outside the center portion,
• the center portion has a stiffness higher than a stiffness of the side portions,
• each of the side surfaces includes a maximum width position indicating a maximum width of the tire,
• in a meridional cross section of the tire,
• an intersection point of a bead baseline and the equatorial plane is a first reference point,
• an intersection point of a straight line passing through the equator and extending in an axial direction and a straight line passing through the maximum width position and extending in a radial direction is a second reference point,
• a line segment connecting the first reference point and the second reference point is a reference line segment,
• an intersection point of the reference line segment and the outer surface of the tire is a shoulder reference point, and
• a line segment connecting the first reference point and the shoulder reference point is a shoulder line segment,
• a contour line of the tread surface is formed by a plurality of arcs arranged in the axial direction,
• the plurality of arcs include a center arc that is an arc passing through the equator, a pair of shoulder arcs each of which is positioned on an outermost side in the axial direction and has a smallest radius, a pair of middle arcs each of which is positioned adjacent to the center arc and has a radius smaller than a radius of the center arc, and a pair of side arcs each of which is positioned between the middle arc and the shoulder arc and has a radius smaller than the radius of the middle arc,
• a protrusion that protrudes outward from the outer surface of the tire and extends in a circumferential direction is provided at a boundary portion between the tread and the sidewall,
• the outer surface of the tire includes a serration region between the shoulder reference point and the maximum width position,
• the serration region includes a plurality of narrow grooves that extend in the circumferential direction, and a ridge that is positioned between the narrow grooves adjacent to each other,
• the serration region is positioned radially inside the protrusion, and
• a total of a height of the protrusion and a maximum depth of the narrow groove is 0.5 mm or more and 0.9 mm or less,
• a ratio of a length of the shoulder line segment to a length of the reference line segment is 85.9% or more and 89.3% or less, and
• a ratio of the radius of the center arc to the radius of the middle arc is 1.85 or more and 2.00 or less.