Having discovered Michelin's in the mid 60's I was a loyal customer until five years ago when they would not stand behind their sorry XRV tires that actually blew out sitting still. Guess that was better than when on the road. Fortunately today there are a bunch of well made radial tires besides Michelin.
OP, in your case I would buy two Michelins because of the odd size but not their XRV. I do not see how the tires on a axle of a heavy vehicle needs to be a RV tire. Just because a manufacture thought a slightly smoother ride from a tire with a thinner sidewall was a good idea... from the track record of the XRV I'll pass on having RV tires on my heavy MH.
Sorry Dennis as this is one of the few areas where we disagree.