| 摘要 |
PURPOSE:To prevent the outer surface of a tire from producing cracks without declining the various fundamental performance of a tire by coating the outer surface of the tire body with a thin layer made of rubber containing EPT or halogenated butyl only at a specified rate. CONSTITUTION:A tire 1 is composed of a tire body 2, a bead section 6 which a bead core 5 passes therethrough, a side wall 7 radially extending from the based section 6 to the outside and a tread 9 continuing to the upper end of the side wall 7. In this case, a thin layer 3 having uniform thickness (t), i. e., from 0.1 to 2.0mm is formed along the outline of the outer surfaces on the outer surface S of the tire body 2, that is, the outer surface S1 of the side wall 7 in the maximum width position (a) and the outer surface S2 of the tread 9 including a groove G. The thin layer 3 is made of rubber 12 containing a 5 to 70 phr of EPT or halogenated butyl. This certainly prevents the outer surface S of the tire body 2 from producing cracks.
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