In these cases, both oxygen and nitrogen escape at the same rate. Myth: Nitrogen is not affected by temperature changes, and therefore maintains proper tire pressure regardless of climate. Fact: Tires filled with nitrogen maintain inflation pressure longer than compressed air-filled tires in fluctuating temperatures. This is why nitrogen is used to fill airplane tires, as temperatures can change dramatically between takeoff and landing. Since nitrogen does not completely eliminate temperature-related pressure changes under normal driving conditions, it is of little benefit to vehicle owners who properly maintain their tires.
Fact: The opposite is true. Even tires filled with nitrogen still require regular pressure checks to identify slow leaks. It is also a good practice to visually inspect tires for cuts, tears, bulges and tread wear, or other signs of impending tire trouble.
It reads in half-pound increments, so you can set your tires' pressures as accurately as we do. This analog gauge is to modern digital gauges as a typewriter is to a laptop computer. While it's ancient technology, it's still far better than nothing, and it will help you to keep your tires in the correct inflation range—and do it for a rock-bottom price.
But we recommend and use the Accutire gauge, so that should tell you where we stand. Type keyword s to search. Today's Top Stories. You may be able to find the same content in another format, or you may be able to find more information, at their web site. Related Stories.
Related Story. Accutire Digital Pressure Gauge. Milton Pencil Pressure Gauge. Stef Schrader Stef Schrader routinely breaks and attempts to take project cars on race tracks. This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses.
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The main benefit of nitrogen-filled tires is that the loss of tire pressure is slower, because the gas in the tire escapes more slowly than air does. These claims are overstated. Small amounts of air naturally leak out of tires over time, especially when tires are subject to large temperature swings.
This is because the walls of tires are slightly porous. When a tire gets hot the air inside it expands. Since nitrogen molecules are bigger than normal air molecules, it is harder for them to leak out.
This means a tire filled with nitrogen will maintain air pressure longer. A normal tire filled with regular air loses an average 1 to 2 PSI pounds per square inch per month. But this improvement is slight — only about 1.
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