being ignorant of trailer tire ins and outs for the first 30 years of my towing life, I always used passenger tires on my boat trailer (about 2,000 total pounds) and regularly towed it thousands of miles each year without any problems, blowouts, tire cupping or anything noticeable happening. I had 3 tire pairs over this time period, all but the first pair were Goodyear passenger car tires, 14" size. Last year I got my 4th set. I replaced the rims and tires with ST tires, only because I needed new rims and the mounted tires I got had ST rated tires already installed.
now that I have a tandem axle HTT, I better realize the stresses and added weight (4,600#) that I have on my trailer and I figure that ST tires of the proper size and inflation are the best that I can do
2014 Shamrock 183
2014 RAM 1500 SLT Crew Cab HEMI 3.21 8 Spd 4X4