Originally Posted by JamesR
I guess I don't get the picture! Does your rear tire look mine in ths attachment?
That is a newer valve extension called "Air-Flexx" It is from germany. It is rigid so it does not need to be fastened to the hub cap. Also, it does not pressurize the line. There is a small shaft that goes from the cap to the inner valve. When you put a chuck on, it depresses the shaft, which in turn depresses the tire valve. That way, if the extension gets loose, or cut you do not loose pressure.