this past sunday was supposed to be a day off but my wife went for a walk with a friend & i decided to take a quick 20 miler & told her it would only take me an hour. i went 20.5 miles & it took 62 minutes. if i did the math correctly thats 19.9 mph average. the coarse (out & back) had no hills, mostly false flats (up & down). calculating my actual average gets tricky because the 20.5 miles were broken up with 25 stop signs. 10 of them were foot down stops (10 or so seconds waiting for cars) and the other 15 were 2-3 mph rolling stops. i also encountered a few peds/riders that i had to slow down to pass. this particular ride was on a local bike trail but i would love to do a non stop 20 miler to see an actual average. im guessing 23-24 mph? oh and im 43, smoker, 6', 200lbs. started riding aug 2004 on a cannondale multisport 2000.