I got the marathons too last year. Already blew one Thursday. I thought they would hold up but I guess I was wrong I will be checking on my rims and see if the will hold up the 110 psi but I doubt that they will knowing my luck. If not I'm going to get the 17.5 tires and rims It's all about the cost Either you upgrade to good tires or pay to keep fixing your skirting and fenders. Lol. But mine is a triple axle so that could be a lot of my problems. Maybe the LT tires will double the life of a ST tire and come out in the long run.