Originally Posted by
Fastfingaz
how do you remove a valve stem Core with an adjustable wrench,,,
Attach to the two flats. Turn counter clockwise. Be careful of the spokes.
A turn or two, and you can usually get it the rest of the way out/in with the fingers.
Note, this is for PRESTA as above.
For Schrader, you'll need the tool, or a valve cap with the tool.