What size tire do you need? Often you can get a better known brand for not much more money, e.g. Sumitomo or Toyo or Yokohoma. All are internationally known and respected.
I'm guessing it's a 245/70R19.5 tire. Sailun is priced about the same as Americus and is a bit better known, but probably about the same quality. The Toyo M143 in that size runs around $300 each and its a highly respected brand. Uniroyal RS20 would work too.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC