Pneumatic tire

A pneumatic tire, comprising:

• a pair of bead cores;
• a pair of bead fillers disposed outward of the pair of bead cores in a tire radial direction;
• a carcass layer disposed folded around the bead cores and the bead fillers;
• a steel chafer including an arranged plurality of steel cords, the steel chafer being disposed between the carcass layer and a rim engaging surface, wherein the steel cords that constitute the steel chafer have a diameter of from 1.0 mm to 3.0 mm, both inclusive, an angle formed by a longitudinal direction of the steel cords and the tire radial direction is from 50 degrees to 75 degrees, both inclusive, and a density at which the steel cords are disposed is from 10 cords/5 cm to 40 cords/5 cm, both inclusive;
• a plurality of sub-chafers made of organic fiber material, the plurality of sub-chafers being disposed covering an outer end portion of the steel chafer from an outer side in a tire width direction;
• and
• a buffer rubber disposed between the carcass layer and the outer end portion of the steel chafer;
• wherein
• the pneumatic tire is a heavy duty tire;
• only one sub-chafer of the plurality of sub-chafers covers an outer end portion of the steel chafer on an inner side in the tire width direction;
• a height Hs of an outer end portion of the steel chafer located outward of the bead fillers in the tire width direction and a rim flange height Hf have a relationship:
• 0.5≤Hs/Hf≤1.0, where the height is measured from a measuring position of a rim diameter;
• a height Hc of an inner end portion of the buffer rubber in the tire radial direction and the rim flange height Hf have a relationship:
• Hc/Hf≤0.4, where the height is measured from the measuring position of the rim diameter and the rim flange height Hf is a difference in height between a maximum diameter of a rim flange portion of a specified rim and a rim diameter of the specified rim;
• the steel chafer is wound up together with the carcass layer, surrounding an folded portion of the carcass layer from an inner side in the tire radial direction;
• a wound up end portion of the steel chafer located inward in the tire width direction extends outward in the tire radial direction than the bead core;
• a wound up portion of the carcass layer is located further to an outer side in the tire radial direction than an outer end portion of the buffer rubber in the tire radial direction;
• and
• a rubber gauge G from the carcass layer to the outer end portion of the steel chafer is in a range 5.0 mm≤G.

A pneumatic tire, comprising:

• a pair of bead cores;
• a pair of bead fillers disposed outward of the pair of bead cores in a tire radial direction;
• a carcass layer disposed folded around the bead cores and the bead fillers;
• a steel chafer including an arranged plurality of steel cords, the steel chafer being disposed between the carcass layer and a rim engaging surface;
• a plurality of sub-chafers made of organic fiber material, the plurality of sub-chafers being disposed covering an outer end portion of the steel chafer from an outer side in a tire width direction;
• and
• a buffer rubber disposed between the carcass layer and the outer end portion of the steel chafer;
• wherein the pneumatic tire is a heavy duty tire;
• only one sub-chafer of the plurality of sub-chafers covers an outer end portion of the steel chafer on an inner side in the tire width direction;
• a height Hs of an outer end portion of the steel chafer located outward of the bead fillers in the tire width direction and a rim flange height Hf have a relationship:
• 0.5≤Hs/Hf≤1.0, where the height is measured from a measuring position of a rim diameter;
• a height Hc of an inner end portion of the buffer rubber in the tire radial direction and the rim flange height Hf have a relationship:
• Hc/Hf≤0.4, where the height is measured from the measuring position of the rim diameter and the rim flange height Hf is a difference in height between a maximum diameter of a rim flange portion of a specified rim and a rim diameter of the specified rim;
• a wound up portion of the carcass layer is located further to an outer side in the tire radial direction than an outer end portion of the buffer rubber in the tire radial direction;
• and
• the steel cords that constitute the steel chafer have a diameter of from 1.0 mm to 3.0 mm, both inclusive, an angle formed by a longitudinal direction of the steel cords and the tire radial direction is from 50 degrees to 75 degrees, both inclusive, and a density at which the steel cords are disposed is from 10 cords/5 cm to 40 cords/5 cm, both inclusive.