A tire comprising: a tread having a plurality of circumferential grooves formed thereon; a belt located inward of the tread in a radial direction; and a band located between the tread and the belt in the radial direction and formed of a spirally wound band strip including a plurality of band cords aligned with each other, wherein the band includes a full band covering an entirety of the belt , and a pair of edge bands disposed so as to be spaced apart from each other in an axial direction and each covering an end of the belt , a cross-section of the band includes a large number of cross-sections of the band strip , a plurality of cross-sections of the band strip are aligned with a gap therebetween in a cross-section of the full band , a plurality of cross-sections of the band strip are aligned without any gap therebetween in a cross-section of each edge band , among the plurality of circumferential grooves , a circumferential groove located on each outer side in the axial direction is a shoulder circumferential groove , and an inner end of each edge band is located so as to be spaced apart from a bottom of the shoulder circumferential groove in the axial direction, characterized in that on a reference ground-contact surface obtained by applying a normal load as a vertical load to the tire and bringing the tire into contact with a flat road surface in a state where the tire is fitted to a normal rim (R), an internal pressure of the tire is adjusted to a normal internal pressure, and a camber angle of the tire is set to 0°, a shape index (F) of the reference ground-contact surface that is represented as a ratio (P100/P80) of an equator ground-contact length (P100) measured along the equator plane (CL) to a reference ground-contact length (P80) at a position corresponding to a width of 80% of a reference ground-contact width of the reference ground-contact surface is not less than 1.10 and not greater than 1.50. a tread having a plurality of circumferential grooves formed thereon; a belt located inward of the tread in a radial direction; and a band located between the tread and the belt in the radial direction and formed of a spirally wound band strip including a plurality of band cords aligned with each other, wherein the band includes a full band covering an entirety of the belt , and a pair of edge bands disposed so as to be spaced apart from each other in an axial direction and each covering an end of the belt , a cross-section of the band includes a large number of cross-sections of the band strip , a plurality of cross-sections of the band strip are aligned with a gap therebetween in a cross-section of the full band , a plurality of cross-sections of the band strip are aligned without any gap therebetween in a cross-section of each edge band , among the plurality of circumferential grooves , a circumferential groove located on each outer side in the axial direction is a shoulder circumferential groove , and an inner end of each edge band is located so as to be spaced apart from a bottom of the shoulder circumferential groove in the axial direction, characterized in that on a reference ground-contact surface obtained by applying a normal load as a vertical load to the tire and bringing the tire into contact with a flat road surface in a state where the tire is fitted to a normal rim (R), an internal pressure of the tire is adjusted to a normal internal pressure, and a camber angle of the tire is set to 0°, a shape index (F) of the reference ground-contact surface that is represented as a ratio (P100/P80) of an equator ground-contact length (P100) measured along the equator plane (CL) to a reference ground-contact length (P80) at a position corresponding to a width of 80% of a reference ground-contact width of the reference ground-contact surface is not less than 1.10 and not greater than 1.50. <EOS>