Patent ID: 7784512

Claim:
A pneumatic tire comprising: a pair of right and left tire side parts formed on both tire width direction sides; a tread part that interconnects a tire radial direction outside end of one of the tire side parts and a tire radial direction outside end of the other of the tire side parts of the pair of right and left tire side parts; and a pair of right and left partition wall parts that are disposed between outside bead parts formed in the pair of right and left tire side parts and apart from the outside bead parts in the tire width direction, extend inward in the tire radial direction from a tire inside surface of at least one of the tire side parts and the tread part, are configured to include inside bead parts that contact a rim at their tire radial direction inside ends, and tripartition in the tire width direction a tire air chamber formed by the tire side parts, the tread part and the rim, wherein the inner diameter of the outside bead parts is formed to be larger than the inner diameter of the inside bead parts, a pair of right and left reinforcement layers are disposed in regions ranging from the partition wall parts to the tire side parts via connection parts between the partition wall parts and the tire inside surface such that the reinforcement layers continue from the partition wall parts to the tire side parts via the connection parts between the partition wall parts and the tire inside surface, outside bead cores that extend along a tire circumferential direction are disposed at the pair of right and left outside bead parts, inside bead cores that are disposed at tire width direction inner sides of the outside bead cores and extend along the tire circumferential direction are disposed at the pair of right and left inside bead parts, a first carcass ply that is configured to toroidally bridge the pair of outside bead cores and both of whose tire width direction end sides are locked to the pair of outside bead cores is disposed in a region ranging from one of the tire side parts to the other of the tire side parts via the tread part, a second carcass ply that is disposed on the tire inner side of the first carcass ply, configured to toroidally bridge the pair of inside bead cores, and both of whose tire width direction end sides are locked to the pair of inside bead cores is disposed in a region ranging from one of the partition wall parts to the other of the partition wall parts via the tread part, partition wall rubber layers that extend inward in the tire radial direction along the tire outer side of the second carcass ply from the tire inside surface of at least one of the tire side parts and the tread part and whose tire radial direction inside ends are formed so as to contact the rim are disposed at the pair of right and left partition wall parts, and the pair of right and left reinforcement layers are disposed at the tire inner side of the first carcass ply and the tire outer side of the second carcass ply.