It is good that many of the tire companies are upgrading their ST tires to more than 65 mph. But can you say the same for the TT manufacturers construction?
Are the currently manufactured TTs designed for wind loads and road vibrations at 70 to 75 mph?
I know what happens in my neighborhood when just wind gusts of 65 to 70 mph hit, let alone a continuous wind load for hours.
As for stopping because the TT has its own brakes, I would like to know the percentage of TT brakes that can be locked up on dry pavement. I can guarantee you that not all of them can.
Of course all of this is just rhetoric because we all drive in a manner which we feel comfortable with.
Whether it is the worry wart that cautiously creeps down the road and frets over every possible thing that can go wrong, or the driver screaming down the road oblivious to the laws of physics. Neither is likely to change.
In most states I could pull my 25 ft. TT as 70 to 75 mph and the cops would not blink and eye. However, since my sweet spot is about 63 mph. I get passed by almost everything on the road. :)