Bicycle inner tubes have two major types of valves.
Bicycle tube valve stem types.
Learn the difference between presta and schrader valve stems on bicycle tubes and how to use different pumps to inflate them.
Unlike a schrader the system doesn t use a check valve it seals entirely based on pressure in the tube or tire.
Now that said it is extremely difficult to get any parts of a high quality in some parts of the world anyway.
Finally keep an eye on the valve length.
If you ve got deep section wheels you ll need bike inner tubes with longer valves to make sure that they protrude.
A third rarer type of valve is the woods or dunlop style.
Bicycle valve stem types from experience i know that the one main drawback to choosing presta is that sourcing new inner tubes may be nigh on impossible in certain parts of the world.
The valve stem opens by unscrewing a knurled textured nut at the top.