Originally Posted by
The Blue Banana
you are very fast.
.1 or .2 mph per each traffic light. I pass through at 8 traffic light / "dangerous intersections" on my daily post -work ride... in total I'm noticing at least a 1-2 mph average drop for the ride, leaving me guessing about what kind of progress I am making.. I just would like to have a concrete number at the end of each ride.
As far as I know, only the (somewhat) expensive Garmins let you change the minimum speed.
With the Garmins, it will record your speed (and other data) throughout your ride and you can look at pretty pictures of your ride.
Here's an example:
http://connect.garmin.com/activity/359741051
(From this thread:
http://www.bikeforums.net/showthread...n-years-for-me).
The Garmin units that use a wheel/cadence sensor (500 and up) are likely going to be more accurate for speed.
I have no idea how long your commute is but you'll probably see more improvement if you do focused riding that isn't commuting.