We have a 2007 Rockwood Ultralite. This summer we had 2 blowouts on the same trip home. The remaining 2 tires didn't look so good either. Long story short, ended up with 4 new tires (a Goodyear, and 2 model years of another brand that I can't recall now) thanks to the tire replacement service guy who opened up his shop late on a Sunday afternoon just for us. The mix of tires was because that was all he had in stock for our wheel size. I blame the problem on cheap OEM tires that barely meet the GVW of the camper. By the way, our camper was not over loaded when we had the 2 blowouts.
I will ride on my mixed variety of tires for a year or two, and then invest in higher range Maxxis or Goodyear tires.
'07 Rockwood 8281SS 5th Wheel
'07 Silverado 2500HD LMM Duramax Diesel / Allison 1000 CC 2LT S/B
Reese 15K 5th Wheel Hitch w/ Kwik-Slide