Quote:
Originally Posted by Greenlight
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"Based on industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph, it is necessary to increase cold inflation pressures by 10 psi above the recommended pressure for the load. Do not exceed the maximum pressure for the wheel. If the max pressure for the wheel prohibits the increase of air pressure, then the maximum speed must be restricted to 65 mph."
Always overinflate on days when the temperature of the road is very hot.