Originally Posted by Willys
Sorry if I'm incorrect about it being required to have ST tires on your trailer. It appears to me that what is being said is that ST tires are of lower quality.
I think our small personal trailers are exempt from many DOT regulations that would apply to longer/heavier and commercial trailers.
I'm pretty sure that quality is going to be sufficient to keep the manufacturer from getting sued if product is used as intended and recommended. I can't see any market reason a business would want to sell an inferior product or take on the added cost of producing another product line unless there was a reason for doing so.
My own inclination would be to purchase ST tires, rated for my load (plus a bit) inflate to manufactures recommended pressure and drive at or under recommended speed for the tire.
I figure that trailer use is different than passenger car use and that tires will be engineered for the intended use. Tread design comes to mind, a lot of engineering goes into tread design and trailer tires do not have to give consideration to use as drive train traction tires, thus can be designed with tread for better towing maybe more hydroplane or scuffing resistance.
I'm not saying that passenger tires are "bad" or "wrong" just would not be my own first choice. If I needed tires and a good set of three appropriate load rated passenger tires was available at a good price I would consider it. Going to a store to purchase tires I would go ST.
If I understand correctly the question we are discussing is what kind of tires to buy TWO of every four or five years. Is the difference in price between ST and passenger so large as to be worth worrying about? Same for the difference in "quality".
To the original question, yes you can put passenger tires on trailer. Some people will say that was a better choice, some will say it's a worse choice. Both with valid points or experience but in the end it's your choice.