A tire comprising a tread configured to come into contact with a road surface at a tread surface thereof, wherein the tread includes a cap rubber, an intermediate rubber, and a base rubber having different loss tangents (LTc, LTm, LTb), the loss tangent (LTc) of the cap rubber is higher than the loss tangent (LTm) at of the intermediate rubber, the loss tangent (LTm) of the intermediate rubber is higher than the loss tangent (LTb) of the base rubber, the tread includes a center portion and a pair of side portions located axially outward of the center portion, the center portion includes an outer center portion, an intermediate center portion located radially inward of the outer center portion, and an inner center portion located radially inward of the intermediate center portion, each of the side portions includes an outer side portion and an inner side portion located radially inward of the outer side portion, the outer center portion is composed of the cap rubber, the intermediate center portion and the outer side portions are composed of the intermediate rubber, the inner center portion and the inner side portions are composed of the base rubber, and the tread surface includes an outer surface of the outer center portion and outer surfaces of the outer side portions; characterized in that when a nominal aspect ratio of the tire is not less than 60%, a ratio (WS/WT) of a width of the outer surface of the outer center portion to a width of the tread is not less than 20% and not greater than 40%, when the nominal aspect ratio is not less than 45% and less than 60%, the ratio (WS/WT) of the width of the outer surface of the outer center portion to the width of the tread is not less than 30% and not greater than 60%, and when the nominal aspect ratio is less than 45%, the ratio (WS/WT) of the width of the outer surface of the outer center portion to the width of the tread is not less than 60% and not greater than 80%, wherein the loss tangents are measured according to the standards of JIS K6394 under the measurement conditions: Initial strain = 10%, Dynamic strain = ±1%, Frequency = 10 Hz, Mode = stretch mode, and Temperature = 30°C; the nominal aspect ratio is the "nominal aspect ratio" included in "tyre designation" specified in JIS D4202 "Automobile tyres - Designation and dimensions"; and the width of the outer surface and the width of the tread are measured in the axial direction in a standard state of the tire, wherein the tire is filled with 92% of a standardized internal pressure and no load is applied to the tire. the tread includes a cap rubber, an intermediate rubber, and a base rubber having different loss tangents (LTc, LTm, LTb), the loss tangent (LTc) of the cap rubber is higher than the loss tangent (LTm) at of the intermediate rubber, the loss tangent (LTm) of the intermediate rubber is higher than the loss tangent (LTb) of the base rubber, the tread includes a center portion and a pair of side portions located axially outward of the center portion, the center portion includes an outer center portion, an intermediate center portion located radially inward of the outer center portion, and an inner center portion located radially inward of the intermediate center portion, each of the side portions includes an outer side portion and an inner side portion located radially inward of the outer side portion, the outer center portion is composed of the cap rubber, the intermediate center portion and the outer side portions are composed of the intermediate rubber, the inner center portion and the inner side portions are composed of the base rubber, and the tread surface includes an outer surface of the outer center portion and outer surfaces of the outer side portions; when a nominal aspect ratio of the tire is not less than 60%, a ratio (WS/WT) of a width of the outer surface of the outer center portion to a width of the tread is not less than 20% and not greater than 40%, when the nominal aspect ratio is not less than 45% and less than 60%, the ratio (WS/WT) of the width of the outer surface of the outer center portion to the width of the tread is not less than 30% and not greater than 60%, and when the nominal aspect ratio is less than 45%, the ratio (WS/WT) of the width of the outer surface of the outer center portion to the width of the tread is not less than 60% and not greater than 80%, wherein the loss tangents are measured according to the standards of JIS K6394 under the measurement conditions: Initial strain = 10%, Dynamic strain = ±1%, Frequency = 10 Hz, Mode = stretch mode, and Temperature = 30°C; the nominal aspect ratio is the "nominal aspect ratio" included in "tyre designation" specified in JIS D4202 "Automobile tyres - Designation and dimensions"; and the width of the outer surface and the width of the tread are measured in the axial direction in a standard state of the tire, wherein the tire is filled with 92% of a standardized internal pressure and no load is applied to the tire.