PNEUMATIC TIRE

In order to improve fuel economy while ensuring driving stability, a pneumatic tire is provided with one carcass ply, two belt plies, and one band ply, and satisfies the following: Wt ¤ -0.7257 × (Db) 2 + 42.763 × Db - 339.67 ---(1) Wt ¥ -0.7257 × (Db) 2 + 48.568 × Db - 552.33 ---(2) Dt ¤ 59.078 × Wt 0.498 ---(3) D t ¥ 59.078 × Wt 0.467 ---(4) where Wt (unit: mm) is the tire cross section width, Db (unit: inches) is the bead diameter, and Dt (unit: mm) is the tire outer diameter, with a carcass cord being made of an aramid fiber cord.