NY still has a 65 mph speed limit which is seldom enforced by any LEO - he would get writer's cramp from the tickets written. With that said, it seems that ~80 is the usual rate of speed for passenger vehicles. I generally, with the speed limiting Blow Max ST tires on our current 5er, try to stay at 60-65 mph - and am usually passed on the local interstates, I-87, I-88 and I-90 by everything with tires including every Class A in sight. Those tires on our 5er are now 2.5 years old and with their poor history, will get replaced next month by some Bridgestone LTs capable of 106 mph. I guess I'll never get to utilize that 'improved' capability as my speed will be ---- 65 mph and maybe
a little more and a speed that I consider safe for an 8360 pound pick up truck and a 12-13,000 pound trailer (59 feet long and 10+ tons worth).
There is a pretty deep paper (over 700 pages) if you want to really get into tire design and analyses. Plug this in GOOGLE, open, and wait for sleep to arrive -
The Pneumatic Tire - NHTSA