I came across this website specific to Trailer Tires
and think it's a good simple guide to a general understanding of how to select and use tires
designed for use on our rigs.
Although it does have some links (natch!) to commercial sites that sponsor it, there are no big "ads" and it doesn't promote one brand over another...
It really does appear to be intended as a public service!
Here's a bit from the introductory paragraph:
"While there is plenty to know about the tires you tow on, in the end, it really boils down to buying the right tires and keeping them properly inflated. "
How simple and true is that?
Check the rest of it out at Trailer Tire Safety - Yuma, Arizona
You'll be glad you did!