Pneumatic tire

A pneumatic tire comprising:

• a tread portion provided with circumferential grooves extending continuously in a tire circumferential direction and axial grooves connecting therewith so as to form a plurality of blocks,
• the circumferential grooves comprising, on at least one side of a tire equator, an axially innermost crown main groove and a middle main groove disposed axially outwardly of the crown main groove to form a middle region therebetween,
• the middle main groove extending in a zigzag manner comprising first corners protruding axially outwardly and second corners protruding axially inwardly which are arranged alternately in the tire circumferential direction, and
• the axial grooves comprising a plurality of middle axial grooves extending from the first corners of the middle main groove to the crown main groove and a plurality of inside shoulder axial grooves extending axially outwardly from the second corners of the middle main groove to form a plurality of inside shoulder blocks,
• wherein at least one of the plurality of blocks is provided with a first variable depth sipe and a second variable depth sipe each having both axial ends opened at edges of the block on both sides thereof in the tire axial direction, and each having a deep main portion having a substantially constant depth and a shallow portion, and in the at least one of the plurality of blocks, the shallow portion of the first variable depth sipe overlaps, in the tire axial direction, with the deep main portion of the second variable depth sipe, and
• wherein a pair of the middle axial grooves circumferentially adjacent is inclined in an opposite direction with respect to the tire axial direction from each other and each of the inside shoulder axial grooves is inclined in a same direction with respect to the tire axial direction.