When commuting around town it’s best to carry around as little gear as possible. So most of us usually end up with one of those tiny hand pumps that take about a half hour to fill a tire up with. Instead, why not steal some air from those evil SUVs people are driving around?
This walkthough teaches you show to make an “Automatic Bicyle Pump”. One end connects to your bike and the other connects to a car’s tire. Free air. Sweet.