Last year I replaced all three on my 1998 Cobra at Bell Tire with a
trailer rated tire of a brand that I never heard of. I trust the guys
at a good tire store to sell me the best product. I design cars in
Detroit and defer to experts in areas where I'm not the expert. RAS is
great for asking glider questions to glider experts, but this isn't a
glider question. If you don't trust the tire store guy, try
tirerack.com and you'll learn a lot. They make trailer tires for a
reason and the reason isn't to trick you. Trailer tires have stiff
side walls to reduce sway, and a tall side wall to absorb bumps and
protect your baby in the box. I paid around $70 each. Don't try to
save $10 on a product that will last 8 years, it's silly.