Don't even worry about exceeding the max sidewall. They are safe many times higher than the rating. Over at http://www.cleanmpg.com there was an article in one of our forums that shows how some police training vehicles exceed the max PSI and the reason they don't exceed it on the street is for liability reasons and not safety reasons.

http://www.cleanmpg.com/forums/showp...7&postcount=13

My hydroponics experiment

You ever notice how hard it is to lip read cartoon characters?
"Crazy is what the sane call Delta Flyer"