Presta valves are extremely common on higher end bicycles. Unfortunately, most bike pumps, hand pumps and gas station compressors do not accommodate the Presta standard. As a result, if you have a bicycle with a Presta valve and you need to add air to the tire, your options are pretty limited. This is where the Juscycling adapter comes into play. We have a simple and affordable tool that threads onto any Presta valve and converts it to a standard Schrader (shrader) valve. The adapter is easy to install, works great and lives on your bike. Once in place, you’ll never have to think about being stuck with a flat tire and can enjoy riding!