So I having just finished 10 months of training for two half-marathons and one full marathon. There was virtually no time to ride my bike. I have been commuting by bike to work mostly full-time since July of 2009. But since marathon training got into high gear, I "commuted" home by running instead of biking. Sometimes I would take the bus or the "L" part way, but by the end I basically was running the whole way home plus some. Okay, so I did ride home a few times this summer and fall but…