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full_mosey's avatar
full_mosey
Explorer
Jul 23, 2013

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 +10lbs, or 45-50psi, why can't I travel 65-75mph?

If this a per mfgr thing, then it is no wonder we get tired(pun) of digging around in the fine print where the real ST specs are hidden!

HTH;
John
Seeking Advice

133 Replies

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  • goducks10's avatar
    goducks10
    Explorer
    Jul 23, 2013
    Let me know when you're running 75mph, and I'll stay home that day.
  • ScottG's avatar
    ScottG
    Nomad
    Jul 23, 2013
    As Howard said, you can't run above 65 without risking tire failure because that's all your ST tires are rated for.
    I would run them at max pressure so you have the benefit of all the tires capacity.
  • fj12ryder's avatar
    fj12ryder
    Explorer III
    Jul 23, 2013
    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.

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