To use the basic Upgrade Set version of the device, you just remove the core of your existing Presta valve (and yes, it must have a removable core), thread the machined aluminum CoreCap onto the top, ...

If your bike has Presta valves on its rims or tubes, you'll know that pumping the tires can be a fiddly business. The Zilch floor pump is claimed to address that problem, with head seals that don't ...