Thanks very much to everyone who replied...
Duane - I actually posted in alt. by accident.
Duane, Andy and John - I've requested the Duginski books from the
library and picked up a couple of FWW while I was there. I will try and
find the Vaugn article.
Luigi and NSBob - Thanks for the supplier pointers. I'll contact them
if I find that I can't find a local tire that will fit.

It is nice to know that there are people willing to help with advise
for others. Thank You,
john