At 03:13 PM 3/15/2009, Rob wrote...
>If you put a tire on that calls for a max of 60 psi and you are
>running it at 40 psi it has 30% less pressure than it should, that
>adds up to heat.

Definitely NOT. "Maximum" has nothing to do with "recommended" or
"correct." If using the type of tire recommended by the manufacturer
(size and load rating), also use their recommended pressure. "Maximum"
means "do not exceed." In most cases, correct pressure is significantly
less.

There are multiple ways of determining proper pressure if running a
non-standard size, but in all cases, the manufacturer's recommendation
is going to be closer than the maximum pressure stamped on the
sidewall.