I had Goodyear Marathons on my prior trailer. Up and down the coast and even harder on them, we outerbeach camp where we air them down to 20#, and they were fine. My new to me TT has Loadstars on them and I have found nothing bad. This TT was a "park model" and the tires were in storage for 6 years then put in the rig for me to drive it away. They look brand new.
I was told by my dealer that the "st" tires have stronder sidewalls than "lt" but it seems that alot of rvers are switching to 'lts'. I guess I will have to research that when the time comes. But I never heard anything good about Maxxis tires.