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What is a flat ratio?

refers to a flatness ratio of the maximum cross-sectional ratio of the width to the height measured from the rim of the tire tread, expressed as a percentage, i.e. a percentage of the height width. At 205 / 60R15 size tires, for example, the maximum width of the cross section is 205 mm, an inner diameter of the tire 15 inches, flatness ratio of 60.

1. The flatness ratio noun

refers to a flat width ratio of the maximum cross-sectional height measured from the rim to the tire tread, expressed as a percentage, i.e., ratio of height accounted width percentage. At 205 / 60R15 size tires, for example, the maximum width of the cross section is 205 mm, an inner diameter of the tire 15 inches, flatness ratio of 60.

2. The flatness ratio of the tire Note

The optimum size of the vehicle tire factory equipped manufacturers are selected after repeated testing. If you want to change different sizes of tires, must be conducted under the guidance of professionals, can not be arbitrary and, because it involves a lot of questions, a little negligence may cause harm to traffic safety. Further, lower than the flat tires appear more “delicate” number, should be more attention and care during use.

3. High flatness ratio characteristics

Since a high flatness ratio of the tire sidewall length, strong buffering capacity, relatively high comfort, but the feeling of the road surface is poor, turning when weak lateral restraint; conversely, low aspect ratio and a large inner diameter of the tire, due to the short sidewalls, the broad tread, thus a large ground contact area, the pressure of the tire can also large, the reaction is very sensitive to the road, cornering lateral resistance ability, vehicle handling and strong. Assembling of the vehicle width, a large inner diameter, the flatness ratio of the tire is low, in addition to handling strength, visual effects and also give the feeling of a very mighty.

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