Escapa offers you a practical solution for inflating your Presta-valve tires at a gas station.
The Genuine Innovations Presta-to-Schrader Valve Adapter (1 pc) screws onto your bike’s Presta (thin) valve and converts it to a Schrader (thick) valve. This is very convenient for, for example, inflating your bike tires at a gas station.
Presta to Schrader Valve Adapter