See this thread, posts 20 and 22, for some additional tire information.
http://www.newellclassic.com/forum/showthread.php?t=987
If you are running H rated tires, they should show a max inflation of 120 psi rather than 110 psi. If you are running G rated tires on the front, they should be changed out for H rated tires as soon as you can. The G rated tires will not take the weight you have on them safely.
For everyone reading this thread, please remember that inflation advice for the 11R24.5 or 305/75R24.5 is NOT relevant for the Newells with the newer, heavier models that changed to 22.5" wheels and 315/80R22.5 tires.