I just had to replace my trailer tires (Maxxis). Had a tread separation that my TPMS did warn me with a drop in pressure from 80 psi to 65 psi.
I had already decided my next set of tires would be good Year Endurance.
I was just south of Salt Lake city. It was a Sunday so I checked in to an RV park and started looking for tires early Monday Morning. Called Big O to see if they had any Endurance tires. They checked their warehouse and all local Big O stores with no luck. Then checked with a Good Year dealer and they could not find a set of Endurance in any of their local dealers and their warehouses in Salt Lake, Denver and Reno.
So I called a Discount Tire which was less than a mile from the RV court I was in. They said they had 29 Endurance tires so I corrected him said you now have 25 tires. They installed a new set in less than 1 hour and I was back on the road before 11:00 am.