| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire endurance test method capable of generating a edge separation failure to raise repeatability in a market without causing internal failure of a bead in a tire duration test for investigating the edge separation failure of the belt layer. SOLUTION: The tire endurance test performs a drum endurance test at a predetermined test load and a predetermined test speed after executing dry heat pretreatment heating a pneumatic tire 1. The test heats, when dry heat pretreating, so that the bead 1C of the tire 1 decreases in temperature. COPYRIGHT: (C)2007,JPO&INPIT
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