With all due respect, and I do mean, WITH ALL DUE RESPECT, that is the dumbest post on the internet at this time. Just look it up on that alexis site or whatever. It has a dumb index of like one brazillion....
DON'T cheap out on trailer tires unless you are stuck trying to get home from a trip. Trying to save a few bucks on a tire might cost you ten fold that when it blows out. Especially if you are towing someone else's rig.
Hankook F19's are good tires, don't know that they have them in a 15 though.