A tire comprising a tread forming a tread surface, wherein a direction of the tread with respect to a vehicle is designated, of both ends of the tread, an end located on an inner side in a width direction of the vehicle is a first end, and an end located on an outer side in the width direction of the vehicle is a second end, the tread includes a base layer, an intermediate layer located outward of the base layer in a radial direction and covering the base layer, and a cap layer located outward of the intermediate layer in the radial direction and covering the intermediate layer, the cap layer includes the tread surface, a loss tangent (LTm) at 30°C of the intermediate layer is lower than a loss tangent (LTc) at 30°C of the cap layer, a loss tangent (LTb) at 30°C of the base layer is lower than the loss tangent (LTm) at 30°C of the intermediate layer, wherein the loss tangents (LTm, LTb, LTc) are determined according to the standards of JIS K6394 at a temperature of 30°C, at an initial strain of 10%, at a dynamic strain of 2%, at a frequency of 10 Hz, under the deformation mode tension, at least three circumferential grooves (24, 24s, 24m) are formed on the tread, whereby at least four land portions (26, 26s, 26m, 26c) are formed in the tread, a ground-contact surface obtained when a load that is 50% of a normal load is applied to the tire and the tire is brought into contact with a flat road surface in a state where the tire is fitted on a normal rim, an internal pressure of the tire is adjusted to a normal internal pressure, and a camber angle of the tire is set to -1°, is a reference ground-contact surface, in the reference ground-contact surface, a land portion (26, 26m1) having a longest ground-contact length is a longest land portion, and a land portion (26, 26s2) having a shortest ground-contact length is a shortest land portion, in the reference ground-contact surface, the longest land portion is formed in an inside tread which is located on the inner side in a width direction of the vehicle, and the shortest land portion is formed in an outside tread which is located on the outer side in a width direction of the vehicle, and a ratio (TL/TS) of a thickness of the intermediate layer in the longest land portion to a thickness of the intermediate layer in the shortest land portion is greater than 1.0 and not greater than 3.5. a direction of the tread with respect to a vehicle is designated, of both ends of the tread, an end located on an inner side in a width direction of the vehicle is a first end, and an end located on an outer side in the width direction of the vehicle is a second end, the tread includes a base layer, an intermediate layer located outward of the base layer in a radial direction and covering the base layer, and a cap layer located outward of the intermediate layer in the radial direction and covering the intermediate layer, the cap layer includes the tread surface, a loss tangent (LTm) at 30°C of the intermediate layer is lower than a loss tangent (LTc) at 30°C of the cap layer, a loss tangent (LTb) at 30°C of the base layer is lower than the loss tangent (LTm) at 30°C of the intermediate layer, wherein the loss tangents (LTm, LTb, LTc) are determined according to the standards of JIS K6394 at a temperature of 30°C, at an initial strain of 10%, at a dynamic strain of 2%, at a frequency of 10 Hz, under the deformation mode tension, at least three circumferential grooves (24, 24s, 24m) are formed on the tread, whereby at least four land portions (26, 26s, 26m, 26c) are formed in the tread, a ground-contact surface obtained when a load that is 50% of a normal load is applied to the tire and the tire is brought into contact with a flat road surface in a state where the tire is fitted on a normal rim, an internal pressure of the tire is adjusted to a normal internal pressure, and a camber angle of the tire is set to -1°, is a reference ground-contact surface, in the reference ground-contact surface, a land portion (26, 26m1) having a longest ground-contact length is a longest land portion, and a land portion (26, 26s2) having a shortest ground-contact length is a shortest land portion, in the reference ground-contact surface, the longest land portion is formed in an inside tread which is located on the inner side in a width direction of the vehicle, and the shortest land portion is formed in an outside tread which is located on the outer side in a width direction of the vehicle, and a ratio (TL/TS) of a thickness of the intermediate layer in the longest land portion to a thickness of the intermediate layer in the shortest land portion is greater than 1.0 and not greater than 3.5.