Pneumatic tire

A pneumatic tire comprising:

• first and second circumferential main grooves extending in a tire circumferential direction;
• and a pair of shoulder land portions and one row of a center land portion defined by the first and second circumferential main grooves,
• the center land portion comprising:
• first and second inclined lug grooves extending at an incline with respect to the tire circumferential direction;
• a pair of first center blocks defined by the first and second inclined lug grooves and disposed adjacent in a tire lateral direction;
• and two or more second center blocks defined by the first and second inclined lug grooves and disposed adjacent in the tire lateral direction,
• the pair of first center blocks and the two or more second center blocks being alternately arranged in the tire circumferential direction to form a block row of the center land portion, and
• the block row of the center land portion being obtained by coupling in a row in the tire circumferential direction and in a zigzag shape via coupling grooves each comprising a groove bottom portion shallower than the first and second inclined lug grooves;
• wherein
• the pair of first center blocks are coupled together via a first coupling groove of the coupling grooves, the two or more second center blocks are coupled together via a second coupling groove of the coupling grooves, and a first center block included in the first center blocks and defined by the first circumferential main groove is coupled, via a third coupling groove of the coupling grooves, to a second center block included in the second center blocks and defined by the first circumferential main groove, forming a first block unit, and
• the second center block that is included in the second center blocks forming the first block unit and that is defined by the second circumferential main groove is coupled, via a fourth coupling groove of the coupling grooves, to the first center block that is included in the pair of first center blocks forming a second block unit different from the first block unit and that is defined by the second circumferential main groove, coupling adjacent block units together.