[jorgensensc]

Originally Posted by WorkinLonghorn

Mine are rated for 80 psi so if I have a load of sand etc. I pressure up to 80.Then when I'm going to be empty for a while I go down to 40 or so otherwise the rears skid real easy. I didn't read the article because right from what you said about 10% less than max,I could see that it was in error.If I ran around empty with 72 psi I would wear out the middle of the tread and be skidding around like crazy since there is insufficient contact area.

I don't know about your particular tires, but I have told many people about the 10% rule and it works remarkably well. As a matter of fact I have a good friend that has a camaro he has always run 32 psi in. He bumped it up to 38 psi and tool a trip from Houston to Dallas as he often does and noticed a 3 mpg increase in economy. He said it didn't ride as soft, but the edge wear from cornering with lower inflated tires seems to be improved and he has better wear across the tire. Maybe you have crazy offroad tires, they are all I can think of that would inflate to 80 psi. If that is the case they would undoubtedly skid around as they are not really made for street driving.
Shawn