[ShrimpBurrito]

All I can say is that many on this forum, including myself, have run 14" tires at pressures higher than 50 psi (as I said before, my Kumhos were at 65 psi) on OEM rims. Have never heard of any sort of rim failure on either this forum on the Casita forum, where the Marathon/Kumho debate has also been argued extensively. I acknowledge that does not mean it's within spec, but on the other hand, I also would argue that it certainly could be within spec, if there even is one. And most importantly, I would argue it's better than using 14" tires on those same rims.

Perhaps wmtire will chime in with his opinion, as this is his professional area of expertise.

Bottom line -- 15" wheels and tires make this a mute debate.

Dave