PNEUMATIC TIRE

A pneumatic tire (1) includes a tread portion (2) provided with at least one zigzag main groove extending continuously in a circumferential direction of the tire with a plurality of zigzag corners. The main groove includes a groove bottom (8) and a pair of groove edges (9). The groove bottom extends in a zigzag manner in the circumferential direction of the tire with a first amplitude (V1). The groove bottom has a width (W) varying periodically so that a maximum width portion (12) and a minimum width portion (13) appear in turn at the zigzag corners. Each of the groove edges extends in a zigzag manner in the circumferential direction of the tire with a second amplitude (V2), wherein the first amplitude is greater than the second amplitude.