A tread surface includes a center arc, a shoulder-side arc, and a shoulder arc, and is formed such that a value given by F1=L1/(TDW×0.5) falls in the range of 0.64≦F1≦0.7, a value given by F2=TR1/OD falls in the range of 1.2≦F2≦2.0, a value given by F3=TR2/TR1 falls in the range of 0.1≦F3≦0.2, and a value given by F4=(β×TDW)/(100×SW) falls in the range of 0.35≦F4≦0.48, where L1 is outline range being a width from an equatorial plane to an edge of the center arc, TDW is extended tread width, TR1 is curvature radius of the center arc, TR2 is curvature radius of the shoulder-side arc, OD is tire outside diameter, SW is total width, and β is aspect ratio.