Originally Posted by
gerv
These are adaptors, so they work as long as the original valve works.
Anyone have a link to an adaptor that has an actual valve?? That would let me re-use some of the presta tubes I have that have the valves blown out.
Huh? A presta valve is molded into the tube when it's made. You can't replace it and you certainly can't replace it with a Schrader valve. Sometimes the threaded insert of a Presta is damaged or unthreads. Theoretically these can be replaced but good luck finding a source.