As to which model to choose, it depends on the bike. For a racing bike you’ll want a pump with a small-diameter cylinder, e.g ...

That is, a pretty interesting bike pump called the Zilch. It’s worth pointing out ... only have it release and jerk your hand into the cassette teeth. What about Schrader valves? Zilch works with ...

If your bike has Presta valves on its rims or ... the Zilch's head hooks onto the pump handle and is secured there by an integrated neodymium magnet. Two Schrader-to-Presta valve adapters are ...

Versatile Pump Head: TwinHead DX fits Presta, Schrader, and Dunlop valves. Long 360 degrees pivot hose. Ergonomic Design: Padded oversized handle for comfort during use. Additional Features ...

[drcrash] sent in this thorough how-to on converting a cheap bike pump to pull a vacuum. Apparently it’s just the thing for small vacuum bagging projects. I’m thinking that this could be ...