We went to Ak in 2011 with our 2010 Denali fw. The tires were over a year old, but less than two, so I figured I might as well get the use out of them. I started noticing wear on inside edge of left rear about 2/3 of the way to Glacier np. I bought two new tires, keeping the better one. I later noticed that the tires on the left side were about 1/4 inch further apart than the right side. I rotated the tires several times on our trip to try to make them last longer. When we were in Tok on our way back, one of the tires looked worse than the others and I had the one tire that I kept from the tire sale mounted on the rim. Guess what? That tire blew in the area of Destruction Bay.
Bottom line, those tires on the trailer are probably relatively cheap. If they came with the coach and are 3 years or older I would replace.
