The improvement of car driving comfort is requested according to development of automobile manufacturing technology. Therefore, many experts have been studying on automotive vibration of normally driving cars to improve automotive driving comfort. In this paper, vibration characteristics of automobile tire that passes cleat are analyzed. Model for automobile tire is verified through numerical analysis and experimental method. Automobile tire is assumed to 7degree of freedom system, and effect on the proposed tire design factor is considered. As this analysis result, it is proved that the proposed tire design factor reduced tire and wheel vibration energy.
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