If you've spent any time at the velodrome, or at the start of a time trial, you've most likely heard the term crack pipe at one point or another, which usually gets an odd look from the uninitiated. And, while there could be a doping reference in there somewhere, what the riders are referring to is the adapter used to inflate a disc wheel with a floor pump. The Silca version is a lightweight aluminum adapter that features threads at the pump end to secure it to the head of your floor or hand pump. The 90 degree turn fits inside the shallow cut out around the valve on the wheel to allow you to easily pump your disc to full, race ready pressure. It is lightweight and fits in your saddle bag so you'll always have it at the ready. The Silca Aluminum Disc Chuck is available in one size and one color.