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
Bionic Man wrote:
What I don't understand is that there is obviously a market for a higher speed rated ST tire without adding the additional 10 PSI. Not sure why someone doesn't step up and fill that void.
Just a guess, but I bet there are 100's of thousands of people like me, if not more, that ran ST tires for many years at 75 MPH and never had a problem with them. Would I buy a higher speed rated tire? More than likely not. No reason to change.
Much like the reason I don't run synthetic oil. The body, seats and everything else is worn out before the engine is so why buy oil at twice the cost?
