A tire comprising: a carcass toroidally extending between a pair of bead portions; and inclined belt layers (3, 3n, 3w) having cords inclined with respect to a tire circumferential direction and a circumferential belt layer (4, 4a, 4b) having cords extending along the tire circumferential direction, the inclined belt layers (3, 3n, 3w) and the circumferential belt layer (4, 4a, 4b) being disposed on a tire radial outer side of a crown portion of the carcass, wherein: the circumferential belt layer (4, 4a, 4b) satisfies a correlation that X ≥ 750 when it is defined that X = Y × n × m, where Y is a Young's modulus in GPa of the cords forming the circumferential belt layer (4, 4a, 4b), n is a number of the cords implanted per 50 mm of width, and m is a number of layers of the circumferential belt layer; the inclined belt layers (3, 3n, 3w) comprise at least two inclined belt layers (3n, 3w) having different tire widthwise widths; and wherein when the internal pressure of the tire is 250 kPa or more, a ratio of a sectional width SW to an outer diameter OD of the tire SW/OD is 0.26 in the case where the sectional width SW of the tire is less than 165 mm, and the sectional width SW and an outer diameter OD of the tire satisfy a relation expression that OD>=2.135xSW+282.3 in the case where the sectional width SW of the tire is 165 mm or more; characterised in that: a tire widthwise width W 1 of an inclined belt layer having a widest width and a tire widthwise width W 2 of an inclined belt layer having a narrowest width satisfy a correlation that 0.25 W 1 ≤ W 2 ≤ 0.6 W 1. a carcass toroidally extending between a pair of bead portions; and inclined belt layers (3, 3n, 3w) having cords inclined with respect to a tire circumferential direction and a circumferential belt layer (4, 4a, 4b) having cords extending along the tire circumferential direction, the inclined belt layers (3, 3n, 3w) and the circumferential belt layer (4, 4a, 4b) being disposed on a tire radial outer side of a crown portion of the carcass, wherein: the circumferential belt layer (4, 4a, 4b) satisfies a correlation that X ≥ 750 when it is defined that X = Y × n × m, where Y is a Young's modulus in GPa of the cords forming the circumferential belt layer (4, 4a, 4b), n is a number of the cords implanted per 50 mm of width, and m is a number of layers of the circumferential belt layer; the inclined belt layers (3, 3n, 3w) comprise at least two inclined belt layers (3n, 3w) having different tire widthwise widths; and wherein when the internal pressure of the tire is 250 kPa or more, a ratio of a sectional width SW to an outer diameter OD of the tire SW/OD is 0.26 in the case where the sectional width SW of the tire is less than 165 mm, and the sectional width SW and an outer diameter OD of the tire satisfy a relation expression that OD>=2.135xSW+282.3 in the case where the sectional width SW of the tire is 165 mm or more; characterised in that: a tire widthwise width W 1 of an inclined belt layer having a widest width and a tire widthwise width W 2 of an inclined belt layer having a narrowest width satisfy a correlation that 0.25 W 1 ≤ W 2 ≤ 0.6 W 1. the circumferential belt layer (4, 4a, 4b) satisfies a correlation that X ≥ 750 when it is defined that X = Y × n × m, where Y is a Young's modulus in GPa of the cords forming the circumferential belt layer (4, 4a, 4b), n is a number of the cords implanted per 50 mm of width, and m is a number of layers of the circumferential belt layer; the inclined belt layers (3, 3n, 3w) comprise at least two inclined belt layers (3n, 3w) having different tire widthwise widths; and wherein when the internal pressure of the tire is 250 kPa or more, a ratio of a sectional width SW to an outer diameter OD of the tire SW/OD is 0.26 in the case where the sectional width SW of the tire is less than 165 mm, and the sectional width SW and an outer diameter OD of the tire satisfy a relation expression that OD>=2.135xSW+282.3 in the case where the sectional width SW of the tire is 165 mm or more; characterised in that: a tire widthwise width W 1 of an inclined belt layer having a widest width and a tire widthwise width W 2 of an inclined belt layer having a narrowest width satisfy a correlation that 0.25 W 1 ≤ W 2 ≤ 0.6 W 1.