Pneumatic tire

A pneumatic tire comprising

• a tread pattern including:
• shoulder primary grooves provided at respective end sides in a tire axial direction;
• a center primary groove provided at a center side in the tire axial direction in relation to the shoulder primary groove;
• and
• a plurality of ribs partitioned by the shoulder primary grooves and the center primary groove, wherein
• an axial groove which extends primarily in the tire axial direction is formed on the plurality of ribs,
• the axial groove includes a point of inflection, and is connected to at least one of the shoulder primary groove and the center primary groove,
• adjacent ones of the axial grooves of the plurality of ribs are disposed in a shifted manner in a tire circumferential direction,
• the ribs include shoulder ribs positioned at respective end sides in the tire axial direction in relation to the shoulder primary groove, and a center rib positioned at a center side in the tire axial direction in relation to the shoulder primary groove,
• the center primary groove has a plurality of groove-bottom protrusions formed intermittently in the tire circumferential direction,
• the groove-bottom protrusion is longer in the tire circumferential direction than in the tire axial direction, and
• all or a part of the plurality of groove-bottom protrusions exists on a line of extension of the axial groove.