TIRE

To provide a narrow and large-diameter tire capable of improving noise performance at high speeds without compromising handling performance at low temperatures. [0002] The tire has a tread portion 2 formed of an elastomer composition 2A. A relationship between a tire outer diameter (Dt) and a tire cross-sectional width (Wt) satisfy a following expression (1). The tread portion includes at least one circumferential groove 10 extending in a tire circumferential direction. A rubber thickness at a groove bottom of the circumferential groove 10 is 0.05 to 0.25 times a maximum thickness of the tread portion 2. The elastomer composition 2A has a phase difference δ of 5.0×10π [rad] or less between a maximum value of strain and a maximum value of stress when repeatedly deformed at a temperature of 30 degrees Celsius and a frequency of 10 Hz in a dynamic viscoelasticity test; 1963.4 ≦ Dt 2 × π / 4 / Wt ≦ 2827.4