I would say for very short periods, it's okay. I've done it a few times, but I really try to keep it less than 65 at most. That's the "speed rating" for standard ST tires.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!