Pneumatic tire

A pneumatic tire, comprising on a tread surface four or five circumferential grooves continuously extending in a tread circumferential direction, five or six land portions partitioned between tread ground contact edges and the circumferential grooves, and between the circumferential grooves, wherein:

• among the land portions, when a pair of land portions located on tread widthwise outermost sides are shoulder land portions, a pair of land portions adjacent to the shoulder land portions on tread widthwise inner sides are intermediate land portions, and one or a pair of land portions adjacent to the intermediate land portions on tread widthwise inner sides are central land portions,
• in a tread widthwise cross sectional view at an unloaded condition when the tire is mounted to an applicable rim and applied with a prescribed internal pressure,
• when drawing a virtual arc R1 protruding to a tire radial outer side, of which a center of curvature is located on a tire equatorial plane, across four tread widthwise edges adjacent to the circumferential grooves of outlines of the pair of intermediate land portions,
• a correlation among each protrusion amount t1, t2 and t3 of outlines of the central land portions, the intermediate land portions and the shoulder land portions from the virtual arc R1 satisfies:
• t1<t2, and t3<t2;
• in the tread widthwise cross sectional view, entire outlines of the intermediate land portions are located on a tire radial side outside of the virtual arc R1 wherein the outlines of the central land portions and outlines of the virtual arc cross each other, and wherein
• the outlines of the shoulder land portions and the outlines of the virtual arc cross each other;
• and
• the virtual arc is positioned further radially outward than tread widthwise edges of the central land portions and the virtual arc is also positioned further radially outward than tread widthwise edges of the shoulder land portions which are closest to the tire equatorial plane.