I haven't had a computer on my commuter in a long time. Average speed is pretty meaningless, especially for commuters, since there are so many variables that impact it including road conditions, weather conditions, wind, traffic volume & patterns, signed intersections, signaled intersections, elevation gains, losses & grades, type of bike, fitness level of rider, give-a-crap-about-speed level of rider, etc.
Just on my own commute my average speed probably varies between 5mph (snowy/icy roads, headwind, snow bike, bundled up, mostly uphill on the way home, afternoon rush traffic) and 25 mph (nice summer morning, on the road bike, tail wind, mostly downhill riding in, little traffic).
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"Let us hope our weapons are never needed --but do not forget what the common people knew when they demanded the Bill of Rights: An armed citizenry is the first defense, the best defense, and the final defense against tyranny. If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government -- and a few outlaws. I intend to be among the outlaws" - Edward Abbey
Last edited by chipcom; 05-29-09 at 07:23 AM.