Had Marathons on my trailer, had no issues. I replaced them with Maxxis tires due to the age of the Marathons. I didn't replace the spare since it looked good, was kept covered and never touched the road. I went to check the pressure on it last week and saw the it completely blew out the top. I'm not going to bad mouth the tire since it was over due for replacement but I've never seen a tire do this. It is very strange. I can take a pic tonight and post it if anyone is interested. I'm getting it replaced with a Maxxis Saturday, again my preference not because I had issue with GY.