i have 500 miles on new 2108Ds with Trail Guide all Terrain 235/75R15 tires that came new with new trailer.View attachment 181970
Not fron China but Viet NamI hate to say it, but that brand is a cheap chinese tire. I would insist on a replacement. The sidewall discoloration *might* be cosmetic, but it's just as likely an indication of problems to come.
Tire problems can be literal killers.
you sound like us although we do not have as many miles but we also do short trips but have a 2 week in Yellowstone coming up which will involve 3000 miles or so.I have a 2020 2108 DS with the same tire brand. My tires have done the same although not quite as pronounced. I’ve put about 5000 miles on them to date. I do a lot of short trips, 3 hours @ 200 miles being the longest. Like most RV owners on this forum I perform a thorough check/inspection of my entire rig before heading out at Spring and before every pull.
Good luck!
You can do a google image search. It just says 235/75R15. Inflate to 44psi. No ST designation on the sticker.