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FAQs - Tire Pressure Gauges

1) Can I tell if my tire is incorrectly inflated by looking at it?

Although it would seem this could be possible, it is not possible to detect even dangerously incorrect tire pressure by the naked eye. The only way to know for sure is by using a reliable tire pressure monitoring instrument and taking measurements 2-3x a month. 

If you let your tires become under-inflated or over-inflated for an extended period of time, it could result in excessive and uneven tread wear patterns that can negatively impact tire performance.

This graphic shows how incorrect inflation can negatively effect your tires:

2) What is the accuracy of your air gauges?

All of our mechanical gauges are calibrated and certified accurate to ANSI Grade B40.1 International Accuracy Standards. This is the gold standard when assessing commercial grade mechanical tire pressure instruments.

How this works is that you need to look at the dial in thirds. For example, a gauge that measures 0-60 PSI will have three increments of 0-20 psi, 21-40 psi, 41-60 psi.

For ANSI Grade B40.1, the first third of the scale will measure 3% of true pressure, while the second third of the scale will register 2% of true pressure, and the final third will read 3% of true pressure.

Here is the margin of error for each third of the gauge based on measurement range:

For a 60 psi gauge:

0-20 psi: 1.8 psi margin of error acceptable (3%)
21-40 psi: 1.2 psi margin of error acceptable (2%)
41-60 psi: 1.8 psi margin of error acceptable (3%)

For a 100 psi gauge:

0-32 psi: 3 psi margin of error acceptable (3%)
33-66 psi: 2 psi margin of error acceptable (2%)
67-100 psi: 3 margin of error acceptable (3%)

So, for best accuracy, we first advise you to determine what pressure level your tires require by consulting your owner's manual or the information sticker located inside the driver side door jam. Then, using the above margins for error, you can select which pressure measurement range (0-60 psi or 0-100 psi) is best suited to meet your needs.


3) What is the quality control process for your gauges?

Exclusively engineered and designed by JACO Superior Products, each gauge is manufactured by our long-time trusted, world-class facility that our team has been working with for both industrial and commercial grade precision pressure equipment for over 30 years.

At our manufacturing facility, every gauge is certified accurate to ANSI Grade B40.1 International Accuracy Standards & visually inspected for quality before being sent to our corporate warehouses where they undergo further visual inspection and testing, before finally being shipped off to our fulfillment warehouses across the country for fast and free delivery to you!

Here is a sneak peak of our Quality Inspection & Testing Lab in Crystal Lake, Illinois:



4) What type of tires can I measure with your gauges?

Our gauges will work will all tires that are equipped with a standard universal air valve stem, also known as the Schrader Valve.

Here's what a Schrader Valve looks like on a bike tire:

Here's an example on a car tire:

Currently, we do not yet offer a high pressure gauge (150 psi) ideal for large freight trucks, or a low pressure gauges (15 psi or 30 psi) ideal for off-road tires (ATVs) that require very low pressure under 10 psi.

We will be expanding our collection to accommodate these specific needs soon!


5) What is the benefit of mechanical gauges over digital models?

Many drivers prefer mechanical gauges due to their ease of use. If you ensure your gauge is certified to ANSI B40.1 International Accuracy Standards like our gauges, then you will have confidence knowing your gauge is accurate & reliable without having to worry about potential issues with electrical components or batteries. This is especially important in very cold or very hot weather conditions, which can negatively effect components and functionality of digital gauges.

Also, our mechanical gauges are built to last from steel & brass, while most digital gauges are made from plastic components. This is one of the reasons digital gauges tend to be cheaper, they don't tend to last as long.


6) What is the diameter of the dial on your gauges?

Our Elite & ElitePro Series feature a large 2 inch dial, while our compact Deluxe Series model offers a 1.5 inch dial. 


7) Can I use your gauges for bicycle tires?

Yes, just ensure that you verify the correct air inflation level required for your bike tires, and choose your gauge based on your target pressure level (see question #2).

Most mountain bikes require 40+ psi of air pressure, so the ElitePro Series - 100 PSI may be your best bet.


8) I live in a very cold area. What is the lowest temperature this can be stored at in my car?

Unlike digital gauges requiring batteries, our gauges will work fine under most cold conditions. Make sure to store them in a dry, safe place and you should be fine!

Temperatures below -10 degrees may slightly decrease performance of the gauge.


9) What materials are your product made from?

Our Elite & ElitePro Series are built to last from brass & stainless steel components, while our Deluxe Series model is made primarily from stainless steel components.


10) My gauge is no longer holding pressure, what can I do?

Occasionally, this can happen if dust or some other material gets onto the valve seat, however it is usually very simple to fix:

We will of course replace the gauge if it proves to be defective in any way, however this is very rare and if you wouldn't mind just trying this, it will correct the problem 99% of the time.

Also, please see the following diagram that gives a visual representation of this process:

11) What is the length of the air hose?

Our ElitePro Series currently features a 10" flexible rubber reinforced, leakproof air hose.


12) Do you gauges come with a warranty?

Of course, customer satisfaction is our #1 priority. If you are not happy, we are not happy. That said, all of our mechanical tire gauges come backed with a 100% Lifetime Satisfaction Guarantee that will cover replacement or repair of any defect for the life of your air gauge. Just let us know, and we will confirm your order with us and get you taken care of based on the issue you are experiencing.


13) Can I deflate a tire with this gauge?

Yes, you can use the built-in air bleeder valve on our gauges to slowly deflate tires to the correct level. This valve bleeds out air slowly, and is best used if you slightly overinflate your tires, and use the gauge to slowly bleed it down to the exact target pressure level. Just confirm pressure with the gauge, and put the dust cap back on the tire valve!

This is why we recommend purchasing a tire pressure gauge along with our air compressor products.


14) Do your gauges require batteries?

No, our mechanical dial-style gauges do not require batteries. Our FlowPro Digital Tire Inflator Gauge (coming soon) is our only product that requires batteries to operate.


15) Will your 60 psi gauges work with tires requiring lower than 10 psi?

We understand that many off-road tires, such as those on ATVs, require very low pressure (under 10 psi sometimes) for optimal performance. 

Although our gauges would provide a reading, at that low of a pressure requirement you will want a gauge with a much lower measurement range on the dial, say 0-15 psi or 0-30 psi, in order to ensure best accuracy.

For a tire that requires lower levels of air inflation, a difference of even 1-2 psi could have a drastic negative impact on performance, unlike passenger vehicle tires that usually operate in the range of 25-40 psi.

This is why a gauge with a much smaller range will have a better margin for error under those circumstances.


16) Do your gauges have a reset button to clear the pressure reading?

Yes, our gauges will hold the reading in place after measuring air pressure. The same button you use to bleed out air from your tires (located on the neck of the gauge) can also be used to reset the pressure reading on the dial back to 0 psi.


17) Do I need a tire gauge if I already own an air compressor with a built-in gauge?

Yes, our team works with a network of trusted mechanics and auto repair professionals, and we do indeed recommend always owning a reliable air pressure gauge if you also own an air compressor with a built-in gauge. This allows you to confirm pressure level after inflation, since many air compressors don't have the same accuracy ratings as gauges. 


18) Can this be used with a 'Presta Valve' for my racing bike?

Currently, our gauges are only compatible with the universal Schrader Valve standard on most passenger vehicles, motorcycles, RVs, bicycles, water tanks, etc. 

Presta Valves are a speciality tire valve type primarily used on racing or off-road bike tires. You would need a "Schrader to Presta" adapter if you would like to use our gauges with your tires equipped with the Presta Valve.


19) Can this gauge be used on a reverse osmosis water tank?

Yes! Most certainly, as long as you have a Schrader Valve to connect to.


20) Would these be good gauges for our RV?

Definitely! We have many customers who love using this on their RVs for proper maintenance and safety during trips.


21) I heard your gauges have glow-in-the-dark dials, how does this work?

Yes, you heard right! Currently, our Elite & ElitePro Series both feature glow dials. They are super easy to activate! Just expose the face of the dial directly to any source of ambient lighting for about 10-15 seconds. The gauge will remain illuminated for about 5-10 minutes.

Common sources of lighting include direct sunlight, emergency light featured on our air compressors, smartphone flashlight feature, vehicle headlight, etc.


22) Can a change in altitude effect the air pressure of my car tires?

Yes, altitude does indeed effect air inflation in tires. Check out our graph that provides an overview of how change in altitude will effect your tire air inflation:

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