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Bicycle tube valve stem types.
Presta schrader and woods valves are each most common on particular types of bikes but they function largely the same and are frequently but not always interchangeable on wheel rims.
Valve length and valve extenders.
Now that said it is extremely difficult to get any parts of a high quality in some parts of the world anyway.
The valve stem opens by unscrewing a knurled textured nut at the top.
A third rarer type of valve is the woods or dunlop style.
If you ve got deep section wheels you ll need bike inner tubes with longer valves to make sure that they protrude.
Finally keep an eye on the valve length.
Learn the difference between presta and schrader valve stems on bicycle tubes and how to use different pumps to inflate them.