“1/3 of car tires in Germany failed to have standard air pressure. If keeping running when the tire pressure is 0.3bar or even lower, the service life of tires will be reduced 30%.” said continental tire companies recently. Meanwhile, it is very dangerous to drive when the air pressure in tires is not sufficient, because the insufficient air pressure in tires will make the braking distance become longer, the operation performance become unstable and the tire become easy to break when the automobile is running at a high speed. In addition, insufficient pressure will increase fuel consumption.
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