Pneumatic tire

A pneumatic tire comprising:

• two main grooves extending in a tire circumferential direction formed in a tread portion, wherein the tread portion has only two main grooves extending in the tire circumferential direction;
• a cap rubber configuring the tread portion divided into a center portion straddling a tire equator line and shoulder portions positioned on both sides thereof;
• and
• compounds having different physical properties disposed respectively in the center portion and both the shoulder portions;
• boundary surfaces of the center portion and both the shoulder portions being positioned on respective tire equator line sides of outermost main grooves positioned nearest to shoulder sides among the main grooves;
• a width of the center portion being set to be within a range of 20% to 30% of a tire ground contact width centered on the tire equator line;
• at least one circumferential narrow groove extending in the tire circumferential direction on a shoulder side of each of the outermost main grooves being formed in both the shoulder portions, the at least one circumferential narrow groove having a depth less than a depth of the outermost main grooves;
• a compound with a tan δ at 0° C. higher than a tan δ at 0° C. of a compound in both the shoulder portions being disposed in the center portion while a compound with a tan δ at 60° C. lower than a tan δ at 60° C. of the compound in the center portion being disposed in both the shoulder portions;
• and
• a JIS A hardness of the compounds in the center portion and in both the shoulder portions exceeding 60 and a difference in the JIS A hardness between the compound in the center portion and the compound in both the shoulder portions being three or less.