16 mph average on a 17.5 mile one way route. I usually get to work in an hour flat or maybe 1 or 2 minutes over, and going home it usually takes an hour and 6 or 7 minutes. I don't reset my cyclometer between leaving for work and returning home so it averages my speeds for the full 35 mile route. I ride either a hybrid outfitted with a dynamo hub or an old mountain bike with slicks, both carry a rack and a single pannier to haul my junk around.