That is, a pretty interesting bike pump called the Zilch ... and jerk your hand into the cassette teeth. What about Schrader ...

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 ...

Finally, also check you have a compatible pump or inflator. Most will cater for both Presta and Schrader valves, but it's better to be safe than sorry. Do check out our guide on bike inner tubes ...