For anyone thinking about upgrading, it looks like Simple Tire has Sailuns on sale today for 10% off. I have no affiliation with Simple Tire or Sailun.
The Sailun in question are ST trailer tires and has nothing to do with motorhome fitment.
Thanks Philly for the tip.... I use the Sailun S637 on my 16k GN triaxle stock trailer for several reasons . One being my and other family safety out on our hiways. The S637 ST have been around since the '10/'11 era mostly in the commercial service trailer industry and the last few years many have found out their a excellent tire for heavy rv trailers with 7k-8k axles.
Thanks, but I won't be installing Sailun tires, nor any other Chinese-made tire for that matter, on my motorhome. Think too much of my family's safety.