Stans No Tubes
Stans NoTubes Threaded Valve Extenders 40mm (Pair)
£23.69
halfords.com Go to shop Description
A pair of 40mm effective length threaded valve extensions for use with removable valve core presta valves. Allows deep section rims to be converted to tubeless use by way of external threads for securing the presta nut. The only externally threaded valve extenders on the market.