Im sure they can hit a 100 mph. When tuning My Turbo Rotax fuel system and STM rage 8 and gen 1 secondary I went out on the Beeline Hwy outside of Fountain Hills and Running Shitty cause I had to small of Injectors I Hit 86 MPH. In Retrospect that kind of speed is Stupid !!!
My Bighorn tires grew over 8" and started rubbing my pipe. BTW Bighorns are not speed rated. LOL.
My friend was jumping a Drakart 2 seater at Gordons well of a nice jump at 100 mph and the tire Bighorn Debeaded when it came off the ground and needless to say that car was destroyed.