Originally Posted by NutDriver

There is an urban legend that in NASCAR, a crew chief glued a Schrader valve to the roll cage of his car where it seemed a little hidden, but you could find it in you looked. Someone asked him what it was for and he told them that he had sealed and connected all of the chassis tubes and filled it with helium. He said that this allowed him to run more ballast even lower in the car. For weeks afterward, you would see other cars in the pits with Schrader valves, seeming to indicate that others were wasting a great deal of time and assets on duplicating a lie.