At what psi can I travel 65-75mph?
This Maxxis pdf has the same table. Using the table(s) above, my ST175/80R13 with 1060lbs load could run at a minimum 35psi with ~4% reserve capacity. Is there a +10lbs rule? I run with +1...
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My thought would be that you can't run 65-75 mph because the chart for the ST tires gives a speed rating of 65 mph. AFAIK ST tires are all speed limited to 65 mph with an exception or two.
