I've been interested in the Maxxis UE-168 as a LT replacement for the 14" ST tires that came with my trailer. The original tires were Trail America ST 205/75R14. After one year I upgraded to the Max...
Many owners on the Casita forums use the Maxxis UE168 and report zero problems. Other options for 14" non ST tires are Hankook RA08 and Kumho Radial 857. I use the Kumho on my Bigfoot and have been very pleased.