Agree with JIMNLIN and Chris takes on what tires OP might think about putting on their 5er. . I had Michelin XPS RIBS on my last 5er with 6,000# axles and though pricey, are a very good tire, as are the others mentioned by Jim and Chris...I too would recommend staying away from "off the wall" named Chinese manufactured ST tires. I'm not sure that Sailun tires make an E rated tire that has been reported on here as being used in the application we're talking about, (do know about their G rated tire), but it would probably be one of the very few Chinese manufactured tires that I'd recommend to take a look at...but again, don't know if they offer a tire in E load range that we know anything about..
Jim