| 摘要 |
PURPOSE: An ordinary tire is provided to form multiple layers of carcass for reinforcing the strength of sidewall part, which causes technical difficulties, increasing the manufacturing cost while inserting reinforced rubbers between each carcasses. Therein, the thickness of side-wall part increases, so does the whole weight of the tire. The result is deterioration of fuel efficiency and riding comfort. CONSTITUTION: An air pressure tire comprises bead parts(3), side-wall parts(2) and a tread part(1). Multiple layers of reinforced cord papers are attached on the side-wall accumulatively for enlarging the strength so that the appropriate thickness of side-wall is secured while supporting the tread. Therefore, a tire is manufactured by less cost and simple processes with no deterioration of riding comfort and separation of bead part.
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