"One trick is to chalk a line across the tread, drive ~100', and see where it is rubbed off. Deflate & repeat until you get an even erasing action, any you have found your ideal balance point for your vehicle weight and the stiffness of that tire. Just my $0.02 - it's worked for me on big bulky tires on a light jeep."

Excellent advice RSPears. I have done the same thing on a few rods that I worked on in the past!