You're in good company. Normally I just attach my bike to my car rack to get from here to there, but last week, a friend and I wanted to stop at a restaurant after our ride, before going home, so I took off the front tire and locked my bike inside the car. Next day, popped the tire back on. No problem, right? After all, you can't put the tire on backwards, right? Well, I discovered that actually, I can. Couldn't figure out why the computer/spedometer wasn't working. And for me, biking is no fun if I can't keep score.

CH