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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.
Types of Bike Tire Tube Stems. A bike tire tube stem is the small metal valve on a bicycle tube that allows you to attach a pump and fill up your tire with air. The tube stem typically comes in two different designs, each with its own advantages and disadvantage. Schraeder Bicycle Tube Valve: