I agree with AsheGuy re Michelins. I have never had a problem of any kind with Michelins on my last three RVs. Current one has Michelin LTX M/S2 which replaced the recalled ones recently. I dont find them too soft on sidewalls but i guess if you are off road and really hard driving then off-road tires are the ones to get. If not using rv for offroad--I mean the rough stuff--then the offroad tires might be a bit noisier and not worth using whereas the tires i have are quiet on the road.
(replace tires with tyres if there is any confusion).
AL
