Soooooo....WNY PAT's link to tire tec says that ST (special tire) designation means a tire made with heavy duty materials...and PDDGM takes a trip with brand new ST tires, from TX to Tennessee (what, maybe 1500 miles, tops) and he's already showing wear??? What is going on here? Also the Tire Tec article talked about high profile trailers, (which a tow dolly is not) needing a stiffer tire (to prevent sway), so maybe I should go to a regular radial. I just don't think I should have to replace tires every two or three years.