Pneumatic tire

A pneumatic tire comprising:

• at least one main groove formed in each tread portion on either side of a tire equator S to form a plurality of land portions,
• a microgroove that extends in a width direction and closes at a time of grounding, and
• a crossing microgroove that crosses the microgroove and closes at the time of grounding,
• wherein the microgroove and the crossing microgroove are formed in at least one of the land portions, such that block groups, each consisting of a plurality of blocks aligned along the microgroove, are arranged in the at least one of the land portions repeatedly in a circumferential direction,
• wherein widthwise sidewalls of blocks in a block group arranged adjacent to each other in a circumferential direction are displaced from each other along the microgroove by a distance L corresponding to from ⅓ to ½ of an arrangement pitch P of the blocks,
• wherein both the microgroove and the crossing microgroove are on the tire equator S,
• wherein both the microgroove and the crossing microgroove are linear, with the microgroove being linear from one main groove to another main groove,
• wherein the microgroove and the crossing microgroove are formed in a proximal land portion in closest proximity to the tire equator S;
• wherein a microgroove and a crossing microgroove are also formed in a land portion other than the proximal land portion, and a groove depth H of the microgroove and the crossing microgroove formed in the proximal land portion is larger than a groove depth J of the microgroove and the crossing microgroove formed in the land portion other than the proximal land portion;
• and
• wherein the microgroove is inclined with respect to a tire meridian G.