| 摘要 |
<p>Provided is a pneumatic tire in which the deterioration of a tire material over time can be visually checked from its external appearance to determine the service life of the tire. The tire is characterized by including a deterioration indicator 7 formed by arranging two or more areas in a row. Time taken before a crack occurrence due to an environmental factor and/or a use factor is different among two or more areas. The deterioration indicator 7 is disposed in an exposed portion, other than a tread surface 1, of the tire.</p> |
