RE: tow master dolly
I currently use a 2006 Tow Master HD 80, and just replaced both tires after 12,000 miles. The factory rep was surprised I got that many miles out of the bias ply tires.
I got new tires from the Tow Master Factory in Fayetteville. Our son is stationed there.
I thought about passenger tires, and if you do a search on the forums you may get more definitive information, but not a lot that I could find. Not sure how they would do, but I chose not to take a chance with them. the difference in cost was not significant to me, but the safety issue is.
I am of the humble opinion that the dolly tires should be trailer tires. The dolly does not have an independent suspension system and from what I was told at the factory and from wear on the tires, they take a pretty good beating and do not wear consistently. I had plenty of tread in the center of the tires, but they word down on each side of center.
I do not have the steel belted, though I have been told the steel belts wear better and longer, whatever that means.
The next time I need tires, I will use steel belted radials to see if there is a significant difference.
Anyway, this may not help you a lot in what you decide, but this has been my experience and my thoughts regarding a "Specialty" tire. I check tires frequently, proper air, etc. I almost waited too long to replace them as one develped a bubble and tread started to separate which I did not detect it until we stopped, even though I check them at every stop in between destinations for damage, wear, air etc., and either missed it, or it occurred within a couple hundred miles between the last stop and the destination.
It would be interesting to know what experience anyone has had using passenger tires on their tow dolly.