You will want to get Trailer specific tires, (match the class to your Marathons) They have thicker sidewalls and will greatly reduce the chance of blowouts. I don't remember the brand that I replaced mine with, I got them at discount tires in Encino. About $220 total. They were not a major brand, but had a warranty and were trouble free for 3 plus years. It is the Carlisle's that peolple had trouble with,including myself.