Adverse safety consequences of under-inflation
Driving at high speeds with excessively low tire pressures can cause the tires to flex severely and to rapidly become hot. A sharp in- crease in temperature could cause tread separation, and failure of the tire(s). Possible resulting loss of vehicle control could lead to an accident.
See also:
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After parking in direct sunlight, drive with the windows open for a few minutes
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The Inside
The interior is quiet enough at idle that one time I didn't even realize it
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