The tires changes characteristics of the element constituting change. Stiffness is one of the various characteristics of the tire. Stiffness of the tire is change contact contour. it is known to affect vibration and noise of the vehicle. In this study we conduct to find influence of change stiffness of the tire due to vibration characteristics inside passenger car. For this study we choose tires of available on the market and measure vertical spring rate and lateral spring rate. Also through the real passenger car we find vibration characteristics in the inside of car. In conclusion, vibration energy is reducing with increase in the stiffness and we find the high vibration level of low frequency band in passenger car due to decreasing stiffness.

1. 서 론
 2. 타이어의 강성 및 진동특성
  2.1 타이어 강성 측정
  2.2 자동차 진동특성
 3. 결 론
 후 기
 References

• 김병삼(Wonkwang University) | Byoung- Sam Kim
• 이태근(Member, Daeduk College) | Tae-Keun Lee Corresponding author