This is a screw-on, 90-degree valve stem extension. It fits onto your existing valve stem and allows you to fill the tire from the side. It’s useful when you have limited clearance between the end of your valve stem and the hub. It makes tire inflation easier because you won’t be fighting with the spokes.
You’ll need at least 1.25″ clearance between the end of your existing valve stem and the hub for this extension to fit. The extension is 2″ long, and it has a valve cap that also serves as a valve core tool (tighten or loosen the core).
7. Thread on the valve cap
*Note: NOT FOR USE WITH RUBBER VALVE STEMS except as a temporary aid for inflation. Rubber stems will be affected by the weight of these extensions as the tire spins, and the rubber stem will bend and possibly fail, causing a rapid loss of tire pressure. If you have rubber stems, these extensions should only be used for inflation, then they must be removed before riding.