Originally Posted by
Iride01
In all fairness to the OP, you should believe him. In fact I had a presta stem come completely out of an inner tube also and it was a very clean separation from the tube and had a little patch of rubber near the bottom that was similar to the stems for tubeless tires.
Mine came out because the locking head on my air hose had not been releasing fully and I had to yank it every time I filled it for over a year. After pulling it out I replaced the air hose on the pump with a replacement from Nashbar and now it works better than ever.
Trying to re-install the stem might be something that's possible, but probably not trustworthy and will likely need tender handling every time it's filled. Something one should only do when they want to prove the others wrong.
As tubes don't cost much, why bother with the trouble.
My current location has no bike stores of any type. I will order more tubes so not that big of a deal, I will just have to wait.
I was shocked when the stem showed no evidence of tearing so I thought others might have seen this before and may have been able to fix it successfully getting me back on a bike faster.