Lots of opinions on tires, especially on these forums. Towmax is a name you often hear, some like them, some call them blowmax. I have no experience with them. If you want my opinion, I'd run them for the couple short trips, look them over closely, before the May trip. If piece of mind is more important than $$$, I'd just replace asap with Provider STs, or GoodYear Endurance, which are designed to run cooler, stay together at higher speeds, like when towing 70 mph, with a nice new Ram.
Hope you enjoy your new to you rig!
Jerry
