What is the thread pitch and size of a Schrader valve stem on an
bicycle's inner tube?
Also, the small metal pin in the middle of the valve is bent so it's
difficult to inflate the inner tube.
This bent pin is also preventing me from unscrewing the valve stem
core. How do I take the core out?
What is the thread pitch and size of a Schrader valve on an inner
Also, the metal pin in the middle of the valve is bent so it's very
difficult to inflate the tube. It's also preventing me from
unscrewing the valve core. How can I take the core out?
If the pin is bent sufficient to make core removal difficult, I'm not sure
you have many options other than using a precision screwdriver to force the
pin straight again so you can get the core-tool on it.
Have you considered simply replacing the tube? Tubes aren't particularly
expensive, or particularly hard to replace. Assuming this is a bicycle or
other uncomplicated piece of machinery...
In what way is it preventing you from taking it out? Is the part of
the pin that you depress for filling bent so that you can't get the
valve tool on it? If so, just grab it with needle-nosed pliers and
straighten it enough to use the tool. You probably need to replace the
core anyway... You might even just cut the end of the pin off, but I'm
not sure if that might result in launching small parts into the tube...
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