Originally Posted by
Jeff Neese
You are not supposed to leave the adapter on the stem. It's only for inflating the tire using a Schrader-style air chuck, such as is found at a gas station. When you're done inflating the tire, you take off the adapter and tighten down the Presta valve.
using my common sense, that is how I've used them. Going against the grain of logic, I experimented leaving it on as described. Wanted to know if being lazy could have a benefit. Big whopping nope!