Aluminum Valve Stem Caps w/ O-Rings*
Set contains 2 valve stem caps with captured rubber seals.
These are the AF1 Racing preferred and recommended valve stem caps for track ridden or raced bikes.
*These valve stem caps actually have the more correct rubber disc seals that stay securely in place during removal and re-installation. (O-rings can become dislodged and fall out, or pinch the Schrader valve).