Tire and Rim Guidelines for Tires Rated at 65 Mph

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THE COST OF SPEED: Tires rated at 65 mph but regularly exposed to speeds 10 miles faster require a 12 per cent decrease in load weight and a five per cent increase in inflation pressure.

RADIAL PLY TIRES SPEED RANGE % LOAD CHANGE INFLATION PRESSURE CHANGE
71 through 75 mph -12% +5 psi
66 through 70 mph -4% +5 psi
51 through 65 mph None None
41 through 50 mph +7% None
31 through 40 mph +9% None
21 through 30 mph +12% +10 psi
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