Tire pressure is very important--it affects everything from handling to braking to gas mileage to tire wear. We recommend that you never use one of those cheap, pencil-type tire gauges. They're notoriously inaccurate. And don't trust the gauge on the air hose at Phil's Quik Gas, either.
This is the best tire gauge we've ever found, period. It's easy to read. It goes up to 100 pounds, so you can use it to check high-pressure spare tires. It holds the reading, so you can remove the gauge from the tire to get a closer look at the number. It's got a flexible hose, so there's no fiddling with the valve stem. The gauge is constructed with a full-geared, solid brass precision movement with a bronze bourdon tube. Unlike piston-plunger-type gauges, the bourdon tube movement is not affected by changes in humidity, temperature, or altitude. And it's got a rubber cover to protect the works against shocks. Lifetime warranty provided by the manufacturer.
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Do not check the tire pressure after you've been driving! The friction of the tires on the road creates heat and will give you the wrong reading. Check the tire pressure *before* you start driving. And what is the "correct" tire pressure? It's different for all vehicles. Look in your owner's manual, which will usually refer you to a label or decal somewhere on the car, typically on the driver's side door jamb.
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