Fast enough I have edged over 100 a couple of times, but most of the time I cruise at about 75. The last time I went faster I was late for a meet up for a ride and was pushing 90-95 most of the way, got into a cager squeeze play with a slow car in front of me and traffic entering from the right made a quick lane change left and the car there slammed on the binders as it was being cut off by the cage in front of it. South Florida drivers are the best..... Later that day my almost new rear tire went flat as the 90 degree valve stem I had installed failed. If you have a 90 degree valve stem with a rubber base get it change now!!! The centrifugal force of the spinning wheel stresses the rubber base and it will fail, probably at the worst time. I have never topped out my scoot, and there is a good chance I never will.