Hello, I also agree that higher speeds are more dangerous. I always try to leave enough room for the "what if". We typically tow our PUP between 60-63. Good sweet spot for gas mileage, handling, etc. What concerns me is the max tire speed rating.
Our 2015 came with 13" Westlake tires. They have been a good handling tire over the short time we have had them. And I am a bit of a nut when it comes to their pressure and temp. But to me, the makers of these tires should increase the speed rating on them. If one has speed ratings that max at 65, they are running at just about max all the time. This to me is a safety concern.
I understand there are many blowouts for many different reason; underinflated, high speed, etc, but I for one would like more of a buffer zone than 2 to 3 mph.
I have searched for higher rated tires, and I can get them. Unfortunately, they are larger, taller, tires that won't fit under my camper. I don't want to pull at 70-80 mph. Heck, I am fine arriving a bit later and keeping my family alive. I would just like a bit more piece of mind knowing I am not maxing out my tires. Anyway, just my two cents.