I had a 3 year old Carlisle tire blow out on me. Replaced ALL of them with Maxxis tires. From all of my research on trailer tires (ST) for RVs to boat trailers, most everyone I've seen recommends the Maxxis.
I had Greenball Tires from a local tire shop on my enclosed work trailer, went from a "C" to a "D" and never had any problems but they did wear a little funny. Not sure why but never had a blowout and I put A LOT of miles on them.
'99 Skeeter 186SX SC, 150 Yamaha VMax
'99 Chevrolet Silverado 2500 4x4