Pneumatic tire

A pneumatic tire, comprising:

• a carcass formed of at least one carcass ply, the carcass ply formed of a carcass main body and a carcass folded-up portion, the carcass main body extending toroidally from a tread portion through a pair of sidewall portions to a pair of bead portions, and fixed to bead cores embedded in the bead portions, the carcass folded-up portion extending from the carcass main body and formed by folding up a circumference of the bead cores from a tire widthwise inner side to a tire widthwise outer side, the carcass ply being formed from a plurality of carcass ply cords, and the carcass ply cords that are positioned on one tire widthwise side partitioned by a tire equatorial plane extend in directions that are symmetrical with those of the carcass ply cords positioned on the other tire widthwise side of the tire equatorial plane;
• a belt formed of one or more belt layers arranged on a tire radial outer side of a crown portion of the carcass;
• and bead fillers provided on a tire radial outer side of the bead cores, wherein:
• the bead fillers are provided such that at least a part thereof is sandwiched between the carcass main body and the carcass folded-up portion,
• a side reinforcement layer is arranged inside the carcass main body only on a sidewall portion of a half portion on the one tire widthwise side partitioned by the tire equatorial plane, the side reinforcement layer formed of a treated member, the treated member formed by coating with rubber organic fiber cords extending parallelly to the carcass ply cords of the carcass ply of the carcass main body,
• at an unloaded condition, when the pneumatic tire is mounted to an applicable rim and is applied with a prescribed internal pressure, a tire radial inner end of the side reinforcement layer is located on a side inner in the tire radial direction than a tire radial outermost position of a rim flange, and a tire radial outer end of the side reinforcement layer overlaps the belt by 5 mm or more in a tire widthwise direction, and
• the tread portion has one or more circumferential main grooves extending in a tire circumferential direction, including a first circumferential main groove, which is the circumferential main groove nearest the tire equatorial plane, a second circumferential main groove on the one tire widthwise side of the first circumferential main groove, and a third circumferential main groove on the other tire widthwise side of the first circumferential main groove, the first circumferential main groove being positioned off-center in the tire widthwise direction with respect to the tire equatorial plane,
• and at an unloaded condition, when the pneumatic tire is mounted to an applicable rim and is applied with a prescribed internal pressure, a contact width of a first tire widthwise outermost land portion partitioned by the second circumferential main grooves and a tread edge on the one tire widthwise side is larger than a contact width of a second tire widthwise outermost land portion partitioned by the third circumferential main grooves and a tread edge on the other tire widthwise side.