At present, domestic cars mostly use tires with small width, small diameter and high flat ratio.
The tire wall with high flat ratio is long and the buffering ability is strong, which is relatively comfortable, but the feeling of the road surface is poor and the lateral resistance when turning is weak. On the contrary, low flat ratio and large inner diameter tires can contact a greater area of the ground, withstanding the pressure is also large, because of its short wall and wide tread. The response to the road is very sensitive and the turning lateral resistance is strong, so that the vehicle handling greatly strengthened.
The flat ratio of the tire is the ratio of the height from the rim to the tread to the maximum width measured in the section of the tire, expressed as a percentage, that is the percentage of the height to the width.
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