if trailer tires only good to 65mph, why not switch?

Wow!! 10 pages.

I always put these questions in the "If you ask, you probably would not understand anyway” catagory.

While there really are no dumb questions when it comes to understanding TT issues; it should be intuitively obvious to anyone that tows, how much harder it is to stop the faster you are going.

There is a reason they limit the Semi-rig speeds and it is not because they cannot go any faster; it is because they have to stop the darn things.