Is there a "Recommended" 15 inch tire now

[TREXHUNTERS]

Hi,
I've read a lot of the posts on here but am unable to find if there is a recommended replacement for the stock Marathons.

Please point me to the right thread if it exists.

I have an 08 3124KB. The tires were 3 years old via the date code.
I just had the apparently common ordeal where the tread separated on my passenger side tire and ripped the bottom of the camper up. To make matters worse the spare's valve stem was cracked and deflated when we tried to put more air in it. Dohhhh!

So, I've learned from reading a few posts that I need to get metal stems, put on tire guards, and build a cage for the plumbing. What I couldn't tell was whether there was a tire that was recommended over the others or is the issue not tire related but that for a single axle, our campers are on the edge of any tires load rating?

I apologize for probably a redundant question but my little mind couldn't assimilate all of the different threads into one thought.

thanks