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Valve Stems. Valve stems are required with every wheel and tire combination. When replacing only the tires or wheels, we highly recommend that the valve stems be replaced. If you choose not to purchase valve stems, simply select Remove From Cart.
The core of the valve stem is usually removable by unthreading it from the stem cylinder, though removal of the core is not usually necessary. The core prevents air from escaping the valve stem, and when depressed, it opens the chamber to allow air to pass into the tire or tube during the inflation process. Ad.