we found the same thing,
even though it is capable of over 88 Deg turning i have had mine over 90, the tires will flex but just some prior planning and less sharp turn will take care of it all, triples will drag more than doubles just by design but if you keep the tire pressure up it will be ok, my friend thought deflating would be good and after several hours jakcking it up and replacing the tire he doesnt any more, it pulled the bead off, sever 90 deg turn with a heavy trailer.....