I was a bike-only traveler in the late 80s and wow was I in shape. Now, due to the cost of owning a car, I'm wondering if it's time to try to see how much of my routine I can do on the bike, I'm guessing most/all of it. Need to get some new tires/tubes/rim bands on my awesome $35 goodwill special, and plan to start substituting car trips with bike trips.