When you're in your car, driving around, and get a flat tire, AAA is only a call away. But if you're on a long training ride and start to feel that tell-tale wobbling, your body fills with dread. Most likely miles from home, you have two choices: give up and call for a ride home—not that any self-respecting rider would ever do that—or change the darn thing yourself.
And even if you're prepared with a spare tube and flat-fixing experience, this road bump can make any triathlete wonder why they ever picked up the sport to begin with. Just think of this as a practice run for the flat you hopefully won't get in your next race.