[Kaline]

Starfire61: Thanks for this input, that is very interesting. However, when you think about it, it does make sense. The bias ply tires have a taller overall height, but the static rolling radius is the same as the shorter radial tire b/c the bias ply tires have more give to the sidewall. That is why the tires fill up the wheelwells more than a radial tire of equivalent size. The original suspension was tuned for bias ply tires, and if the ride & handling engineer on these vehicles did a good job picking spring rates, bushing rates, etc, then tire selection makes a BIG difference. I think most of us just assume that radial tires are better!