When a tire says, trailer service only..That means something, to me at least.
Having said that,I have never had a tire
blow out on an rv trailer.As a semi truck owner, you learn quick that good tires can save your life, especially the front and run good tires all around, same goes for any trailer, don't run worn tires...
When its time to replace my travel trailer tires, the ST's are gone with an LT replacement.Most TT's are not made to full time or go down rocky/wash boardy roads, its up to the owner to make the needed changes.