Tire deterioration judging tool, pneumatic tire equipped with tire deterioration judging tool, tire deterioration judging method, and tire rehabilitation possibility judging method

摘要

PROBLEM TO BE SOLVED: To provide a tire deterioration-determining tool capable of determining the deterioration degree of a pneumatic tire in detail by enhancing the discrimination sensitivity of the tool, and to provide a pneumatic tire equipped with the above tool, a tire deterioration-determining method and a method for determining tire reclamation possibility.SOLUTION: A tire deterioration-determining tool 10 comprising the molded body of a rubber composition is configured so that the ratio S/V of a surface area S (mm) of a portion of the molded body 11 excluding a loaded surface to the volume V (mm) of the molded body 11 is 0.1 or more, and the above surface area S is 50 mmor more. Such like tire deterioration-determining tool 10 is loaded on a tire inner face.SELECTED DRAWING: Figure 1