Originally Posted by
tarwheel
I can live with the lower speed commuting because my goals are different for that. However, commuting 3-4 days/week keeps me in great shape so that I have no trouble doing faster group rides on the weekends using my racing bikes.
Bingo. This is the main reason I want to commute. I figure I can get some "free miles" during the week, and those will allow me to go harder/faster (off-road) on the weekends.