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...
Forum Discussion
Turtle n Peeps wrote:
OP here is a clicky from GY.
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My bad. I first read this as a Good Year tire only document. But clearly it does call out "industry standard", so I guess it applies to all ST tires. Which is interesting, because I've never seen this stated by other ST tire OEM's. Not to mention, I haven't even caught mention of this in the dozens/hundreds of other threads related to ST vs LT tire debate threads.
dbbls wrote:
Tires are tested in a laboratory on a rotating drum with a static force pushing down on the tire. It is not subject to pot holes or the crown in the road or other rough conditions which increased the load on tires. ST tires are tested to 65 mph and no more so who knows how much faster they can go. They might start flying apart at 66 or 86. One thing for sure, they will be damaged at sustained speeds higher than the rated speed. Increased speed causes increased heat and heat is the enemy of tires. If you need to go faster get LT tires.
This is a load of made up crap. You obviously have no clue how tires are engineered, built and tested.
