Very good point! It only takes me about 8 minutes more by bike to get to work than by car, so it's only 16 minutes extra round trip; and for those additional 16 minutes of commute time I get an hour of exercise. Additionally, I cancelled my gym membership when I decided to commute full time by bike. Cancelling the gym membership saves me $35 per month. Add that $35 per month to the $65 per month I spend driving to work with my car, and you've got a solid $100 per month savings. On top of that, my bike doesn't need as much maintenance as my car, and if something breaks, it's typically cheaper and easier to fix.