A tire comprising: a pair of beads; a carcass extending on and between a first bead and a second bead out of the pair of beads; and an inner liner located inward of the carcass, wherein the carcass includes a carcass ply, the carcass ply includes a carcass cord, the carcass cord is a steel cord, the carcass cord includes an outer sheath forming an outer circumferential surface thereof, the outer sheath includes a plurality of outer sheath wires, the plurality of outer sheath wires are aligned along an outer circumference of the carcass cord, a sum of intervals between the adjacent outer sheath wires is smaller than an outer diameter of the outer sheath wire, wherein an interval between two adjacent outer sheath wires is defined as the distance, between the two outer sheath wires, measured along a straight line connecting the centers of the two adjacent outer sheath wires, the inner liner forms an inner surface of the tire, characterized in that an air permeability coefficient of the inner liner is not greater than 12 × 10 -11 cc·cm/cm 2 ·sec·cm Hg, wherein the air permeability coefficient is measured according to the standards of JIS K6275-1 with the following measurement conditions: measured by a differential-pressure method in an environment of 60°C using a gas permeability measuring device "G2700" manufactured by Yanaco Analytical Systems Inc with air as the test gas at a test temperature of 60°C; the carcass cord includes a core at a center of the carcass cord, and an intermediate sheath located between the core and the outer sheath, wherein the core is composed of one core wire, a number of the intermediate sheath wires included in the intermediate sheath is 6, a number of the outer sheath wires included in the outer sheath is 12, and the core wire, the intermediate sheath wires, and the outer sheath wires have the same outer diameter, the plurality of intermediate sheath wires are aligned along the outer sheath, and a twisting direction of the intermediate sheath wires in the intermediate sheath is the same as a twisting direction of the outer sheath wires in the outer sheath. a pair of beads; a carcass extending on and between a first bead and a second bead out of the pair of beads; and an inner liner located inward of the carcass, wherein the carcass includes a carcass ply, the carcass ply includes a carcass cord, the carcass cord is a steel cord, the carcass cord includes an outer sheath forming an outer circumferential surface thereof, the outer sheath includes a plurality of outer sheath wires, the plurality of outer sheath wires are aligned along an outer circumference of the carcass cord, a sum of intervals between the adjacent outer sheath wires is smaller than an outer diameter of the outer sheath wire, wherein an interval between two adjacent outer sheath wires is defined as the distance, between the two outer sheath wires, measured along a straight line connecting the centers of the two adjacent outer sheath wires, the inner liner forms an inner surface of the tire, characterized in that an air permeability coefficient of the inner liner is not greater than 12 × 10 -11 cc·cm/cm 2 ·sec·cm Hg, wherein the air permeability coefficient is measured according to the standards of JIS K6275-1 with the following measurement conditions: measured by a differential-pressure method in an environment of 60°C using a gas permeability measuring device "G2700" manufactured by Yanaco Analytical Systems Inc with air as the test gas at a test temperature of 60°C; the carcass cord includes a core at a center of the carcass cord, and an intermediate sheath located between the core and the outer sheath, wherein the core is composed of one core wire, a number of the intermediate sheath wires included in the intermediate sheath is 6, a number of the outer sheath wires included in the outer sheath is 12, and the core wire, the intermediate sheath wires, and the outer sheath wires have the same outer diameter, the plurality of intermediate sheath wires are aligned along the outer sheath, and a twisting direction of the intermediate sheath wires in the intermediate sheath is the same as a twisting direction of the outer sheath wires in the outer sheath.