Many 5th wheel owners experienced tire failures with the Goodyear Marathons and, to a lesser extent, Goodyear Wrangler HTs that came on our rigs. I had 3 of 4 Marathons go bad on our previous 5th wheel, one of which failed with a tread separation that did over $2,500 in damage.
The accepted fix has been to go to the all-steel construction Michelin XPS Rib, a scaled down version of Michelin's Class 8 steer axle and trailer tire that's recommended by Michelin for commercial trailer applications. I've never heard of a failure on these Michelin XPS Ribs by anyone who's made the conversion.
Based on that, I had the Wrangler HTs on our 5th wheel changed out to Michelin XPS Ribs this summer, and I make no apologies for it. I'll use the best tool for the job, regardless of where it comes from, and I refuse to put my family and property at risk over political issues. For me, it's a matter of priorities. If your priorities are different, that's your business - vote with your wallet however you want.
Rusty