A pneumatic tire including a first row of blocks arranged in a substantially central region of a tread of the pneumatic tire, wherein the first row of blocks includes a plurality of first blocks; a plurality of first grooves, each arranged between two adjacent first blocks; a plurality of second rows of blocks each including a plurality of second blocks, each arranged on either side of the first row of blocks; a plurality of second grooves, each arranged between the first row of blocks and each of the second rows of blocks; and a plurality of third grooves, wherein each third groove is arranged between two adjacent second blocks, the third grooves including a plurality of fourth grooves and a plurality of fifth grooves, with each fourth groove being narrower than each fifth groove, and the fourth groove and fifth groove being arranged alternately.