Class C tires are no different than 250/2500 pickup tires, or the 350/3500 dually versions of those trucks. But an RV may be too tall for their door or too long for their lift. I had a set installed on a Class C by Pep Boys and they just jacked it outside their tire bay. Others just won't do that. Twice, I've jacked it myself, put it on stands, pulled the wheels and taken them to the tire shop.
Any tire labeled "LT" or load range "E" breaks down no harder or easier than any others with the same designation.
WIMPS!!!
LTX M/S2 should be an improvement over the LTX M/S tire that is OEM on many trucks and all Ford Class C chassis.