2007 Dodge Grand Caravan SE: Tire Gauge

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Q: How does one keep tire pressure in check before it’s too late? How does one detect tire punctures early before an accident ? A: As shown in the video... **************** Applications: Road safety, Off roads, Construction sites, Renovations, School Bus, Trucks, Sprinter vans -- Fits most vehicles. ****************************** Indicators: Yellow: warning Red: Danger

Product Link: https://dl.wish.com/jUxc7 Code: nslzqhb ************************

Relevant Background: "A tire-pressure gauge, or tyre-pressure gauge, is a pressure gauge used to measure the pressure of tires on a vehicle...Since tires are rated for specific loads at certain pressure, it is important to keep the pressure of the tire at the optimal amount. Tires are rated for their optimal pressure when cold, meaning before the tire has been driven on for the day and allowed to heat up, which ultimately changes the internal pressure of the tire due to the expansion of gases. The precision of a typical mechanical gauge as shown is ±3 psi (21 kPa). Higher precision gauges with ±1 psi (6.9 kPa) uncertainty can also be obtained..." ("Tire Pressure Gauge", https://en.wikipedia.org/wiki/Tire-pressure_gauge)
Relevant material on over inflation: "It is a common misconception that over inflating your tires will provide more responsive handling and greater fuel efficiency. In fact, over-inflation is detrimental to the tires and can be dangerous. For the best handling and fuel efficiency, adhere to the manufacturer's optimum tire pressure. Your tire’s optimum pressure is specified by your car’s manufacturer. It is determined by a series of tests and analyses for each model, and takes into account several factors: Tire wear and tread life, Driving comfort, Fuel efficiency, Handling, Exceeding the manufacturer's optimum tire pressure is not recommended for the following reasons: Tires will wear out prematurely. When overinflated, your tires round out on the tread section, causing the center to wear significantly faster than the outer edges. Your tires might only last half the life they normally would. Over inflation can cause loss of traction. Even in normal conditions, you are more susceptible to losing traction, spinning out or crashing. This is especially noticeable in winter weather...Over inflation creates a harsher ride. Overinflated tires provide a bumpier ride, so you will feel every dip in the road..." ("What Happens If I Overinflate My Tires?", https://www.yourmechanic.com/article/what-happens-if-i-over-inflate-my-tires)

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Relevant material on under inflated tires: "Yet according to a recent survey by Transport Canada, up to 50 percent of cars on the road have at least one tire that is 10 percent under- or over-inflated, and 10 percent of those are under-inflated by as much as 20 percent. Of course, it’s pretty hard to detect by eye, and most people rely on tire-pressure monitor systems to warn them – but these systems don’t kick in until the tire’s 25 percent below the recommended pressure. By that time, the tire’s handling has already been compromised and Transport Canada warns that it’s “three times as likely to be involved in a crash.” In addition to affecting performance, under-inflation can also reduce a tire’s lifespan: a vehicle with a single tire under-inflated by just eight psi can expect reduced tire life of up to 15,000 km. Furthermore, an under-inflated tire can cost you money at the pumps. How much fuel a vehicle consumes is affected by the effort expended to overcome inertia, or its resistance to rolling. Each one-psi drop in pressure on all four tires can lower fuel efficiency by 0.4 percent – which may not sound like much, but if the average person drives 20,000 km per year it could add up to an extra 545 litres of gas, or nearly enough to pay for a new set of tires (and the air inside them)." ("Under-Inflated Tires are Dangerous – and Cost You Money", https://www.autotrader.ca/newsfeatures/20180507/under-inflated-tires-are-dangerous-and-cost-you-money/)
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Location: North America

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