Tire and Rim Guidelines for Tires Rated at 65 Mph
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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