Assertion: radial tire's durability | /r/CapableOf | complete present invention
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text: The present inventor intensively studied to resolve the above-mentioned problems to find that, by using a polyester cord having predetermined physical properties as a reinforcing material of a belt reinforcing layer and ensuring adhesive strength between the polyester cord and rubber, the run-flat durability can be improved while inhibiting vibration during tire rolling and tire protrusion during high-speed traveling, thereby completing the present invention.