TIRE

It is an object of the present invention to provide a tire having improved fuel efficiency during high-load running. Provided is a tire comprising a tread part, wherein a tire outer diameter Dt is 600 mm or less, wherein the tread part is composed of a rubber composition comprising a rubber component and a filler, and wherein a tire cross-sectional width Wt, in mm, and a tan δ at 30°C (30°C tan δ) of the rubber composition satisfy the following inequality (1): 30 ° C tan δ ≦ − 7 . 84 × 10 − 5 × Wt − 195 2 + 0.175