The "China Bomb" crap is just that, crap.
Fact: Most trailer tire failures are China made tires.
Reason; Most trailer tires are made in China.
If most trailers used USA made tires, guess what, most tire failures would be USA made tires.
Keep them inflated, don't hit curbs, don't overload them and all should be well.
http://www.rvtiresafety.net/2019/02/...omb-tires.html