We need to consolidate all the threads concerning these ST tires. It is ridiculous. I know when my first TowMax / Blow-Max tire blew, i started searching for solutions; this site gave me plenty of information to help with my decision. But there is a lot of inconsistent information between threads. There are really only a hand full of tires that will do what we are asking of them. You can go to the maximum, like I did or you can cut it close and still be in good shape. But there is not a Heartland 5th wheel that should be on 16 inch ST tires. The math is not there, and if it is, then you have 0 service factor. IF you are Driving across Arizona, New Mexico, or Texas in the summertime, you better drive between 6 am and 10 am then after dark. Because when the desert floor is 125 degrees, you WILL loose those ST tires. Nothing says "adventure around every corner" like driving on a set of "will pop, blowmax, ST tires"