OMG, I hit 18 mph the other night and thought it was way too fast (note to self, there probably will be a day that that speed won't scare me) but that was only because I was going down a slight decline. Probably scared me because I was out earlier than usual, the street had many patches which makes it rougher, and there was actually traffic. OK, my logical mind at work here. The more I ride, there is an increase in my averages. I thought I was doing great at 8.8 - 10 mph on flats and slight inclines. Guess I'm just a slow rider.