Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to inflate bike tires [title] A schrader valve is also called an american valve, or a car valve. [step] The valve stem is surrounded by a threaded valve core; to press down on the stem, you need to use a tool like a pen cap or your thumbnail. Schrader valves are typically wider in diameter and shorter than presta or woods valves.

Ending1: They're usually found on cars, less expensive bikes and mountain bikes. To open a schrader valve, simply unscrew the rubber cap at the top. Ending2: These valves cover the other valves, then hold the gasket in place while you roll. [substeps] Be sure to treat the valves with quality chemical solvents (such as sodium) and lubricants used by air conditioners. Ending3: [title] Know how to use an old measuring tape to apply pressure to the pedals. [step] Move your pipe slightly forward for the smallest amount possible. Ending4: [substeps] You should use a gas chromatic valve on a car. [title] Place both of your hands on either of the valves a foot at a time.

Answer format: ending1/ending2/ending3/ending4