I have no clue what my max speed is. No computer.
I rode 4 miles in 7 minutes one day on my hybrid. That's something like 34 mph (i think).
I took me 15 minutes to catch my breath. That same distance takes me the same time on a bike and in car on average due to traffic. That day it took me 1/2 the time on a bike that it would have taken in a car. Downhill, tailwind, and hauling arse.