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
As posted, Goodyear has published a bulletin that says you can definitely increase the tire pressure if your max load requires less than the maximum air pressure of the tire.
On ForestRiverForums.com, a tire dealer (wmtire) contacted Maxxis with the same basic question. The answer (quoted from Maxxis) was essentially the same. From 66-75mph, you can increase the air pressure by 10psi (so long as you don't exceed the wheel or tire's maximum pressure). From 76-85 mph, you have to increase another 10psi *and* you lose 10% of the tire's load carrying capacity.
So yes, the rule exists.
That said, I'm a 62-63mph driver when towing and maximum PSI inflater (even though my scaled weights dictate that I can go faster and use less PSI).
On ForestRiverForums.com, a tire dealer (wmtire) contacted Maxxis with the same basic question. The answer (quoted from Maxxis) was essentially the same. From 66-75mph, you can increase the air pressure by 10psi (so long as you don't exceed the wheel or tire's maximum pressure). From 76-85 mph, you have to increase another 10psi *and* you lose 10% of the tire's load carrying capacity.
So yes, the rule exists.
That said, I'm a 62-63mph driver when towing and maximum PSI inflater (even though my scaled weights dictate that I can go faster and use less PSI).
