Originally Posted by HONDAMAN174
Ashley- a question for you then. I recently did the same thing of upgrading from c's to d's. Inflated to 60 psi. Trailer loaded 7500 lbs. Had a WICKED sway problem both to and from a short camping trip- DW (who was following) thought for sure I was going to lose it on more than one occassion. Anyhow, read a pressure chart (from different tire manufacture) that I could lower my pressures back down to about 50 and still be at/above capacity. Pulled fine after that.
So...do you think having the tires at the higher pressure was giving it a little too much "rebound spring"?
2014 Stealth Evo 2850 "Woodstock"
2011 Toyota Tundra Rock Crawler TRD 5.7 "Clifford"
What you described definitely could/would be from over inflation, that is why a maximum rated pressure is just that. The maximum rated pressure a tire can handle is not always the best pressure to run at which you figured out the only way you can sometimes, Trial and Error.
When a tire is overinflated it tends to "Crown Out", meaning the Face of the tire that contacts the road surface is bulging out more in the middle so to speak. This will cause the feeling you had due to less "Good" contact with the road. Think about it this way, a constantly overinflated tire will wear faster in the middle tread of the tire, a constantly under inflated tire will wear faster on the outer edges of the tire, just to help you understand the principal of how air pressure changes the shape of the face of the tire.
With that in mind though, remember this, the less air pressure you run, the more sidewall flex you get which translates into heat generation as well as weakening of the steel belts in the sidewalls, and ultimately the "Tire Bombs" everyone likes to speak of. Regardless of what brand tire you have, under inflated tires tend to be the biggest cause of premature tire failure we see, especially the hotter the roads and weather.
So try to find that happy medium where you get the best ride and handling, but are also running the most air pressure within the rated specifications of course. There is not one perfect answer that fits every situation, that is why us learning from each other is so important.
Oh yeah, one last thing. I have even found over the years different tires, based on their construction, will "Crown" more or less at the same exact air pressure. So, just because one particular tire felt the way it did at 60 psi, you might find another brand performed just fine at that same pressure.