FAQs - Tire Pressure Gauges | JACO
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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 incorrectly inflated tires by the naked eye. The only way to know for sure is by using a reliable tire pressure gauge and taking measurements at least once every other week.

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:

2a) What is the accuracy of your mechanical 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 grading the accuracy of 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 the target pressure level you need for your specific use 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.


2b) What is the accuracy of your digital gauges?

Our digital gauges are extremely accurate. All of our digital models are factory calibrated to ±1% full scale range, except for our new ElitePro Digital Tire Pressure Gauge - 200 PSI which is calibrated to professional racing standards of 0.50% full scale range.


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

All of our products are exclusively engineered and designed by JACO Superior Products in the USA. After each unit is engineered to professional standards by our team, we then link up with our long-time trusted, state of the art production 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 calibrated & certified accurate to its advertised standard, then visually inspected for quality and performance before being sent to our main company warehouse in Illinois, where they undergo further visual inspection and testing before finally being delivered to one of 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?

Each specific gauge model has its own recommended use, however in our collection of products you will find options for:


7) Can I use your gauges for bicycle tires?

Yes, all of our gauges can be used for bike tires. However, if your bike has a presta valve stem system, you will need to use our BikePro Tire Pressure Gauge Series, which includes attachments for both presta valves & schrader valves.


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

Our gauges will work fine under most cold conditions. Make sure to store them in a dry, safe place - such as the glove box, center console, or a cargo organizer.

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


9) What materials are your product made from?

We only source the highest quality materials and components for our gauges. We use premium quality steel, brass, aluminum, and rubberized & composite materials for maximum durability. This is why we are able to provide you with a 100% Satisfaction Guarantee!


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 your gauges come with a warranty?

Customer satisfaction is our #1 priority. If you are not happy, we are not happy. That said, all of our non-digital products come backed with a 100% Lifetime Warranty that will cover replacement or repair of any defect for the life of your product. All digital products include a 12 Month Warranty & 100% Lifetime Priority Customer Support. Just let us know if you have any issues at all, and we will confirm your order with us and get you taken care of based on your needs.


13) Can I deflate a tire with your gauges?

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 over-inflate 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. However, all of our digital gauges do (2x - AAA batteries included).


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 and four-wheelers, require very low pressure (under 10 psi sometimes) for optimal performance. 

Although our 60 PSI gauges would provide a reading, at that low of a target pressure you will want to use our Elite Tire Pressure Gauge - 15 PSI which is specifically designed for this use.


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 my vehicle has TPMS that displays tire pressure on the dashboard?

Yes, our team works with a network of trusted mechanics and auto repair professionals, and we do recommend always owning a reliable tire pressure gauge if you also have TPMS built-in to your vehicle. This allows you to confirm pressure level before, during, and after inflation. It also reduces the need to constantly walk back and forth to your dashboard to see the readings while inflating.


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. We recommend the ElitePro 100 PSI or EliteProPlus 160 PSI for this.


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

Yes, you heard right! Currently, almost all of our non-digital gauges (besides the Deluxe Series) feature glow-in-dark 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: