High profile tires on off road packages on trailers. hmmm

Larger wheels and tires put more stress on everything else, I found that out the hard way with lifted trucks over the years. RV manufacturers are not beefing up the RV construction when they do this, they just use taller springs or taller brackets. It's still the same frame and axles, and usually a pos Lippert frame at that. Nothing more than additional bling, it looks cool.