Easier to tighten down, 4 sizes to suit every wheel in your arsenal. Yes, Zipp even obsess about valve extenders. Theirs feature a 3mm hex broach in the barrel to guarantee you get a tight, secure fit and perfect seal. Zipps extenders also have a raised machined head with a slight bevel to ease installation of the pump head. Includes complete installation instructions.
Note: Zipp highly recommend pre-installation of valve extensions on all tires or tubes, including spares. Do not attempt to remove and reinstall a single extension on multiple tires or tubes each time you inflate your wheels as you can damage the valve stem – and that could cost you the race