These custom-designed valve extensions from Zipp have a 3mm hex broach within the barrel that guarantee a perfect seal when tightened and raised. They also have a machined head with a slight bevel to ease installation of the pump head and a ridged section that keeps the head from slipping. These Zipp valve extensions fit the Zipp 303s and new 202s.
Note: Valve extensions require careful installation, so we highly
recommend pre-installing them on your spare tires and tubes before your