47 miles per hour right here...I think I could go faster, but I haven't ridden on that hill in a while.

About all you guys afraid of crashing...sew your sack back on! confidence in your machine in crucial to the sport!

As for flat ground top speed, it is 38, on route 1 near rehobeth beach in delaware. I held it for about a minute, and I couldn't take it anymore.