Pressure gauges do not tell the exact and accurate tire pressures and the best way is that use your floor pump and built an exact pressure gauge with it for measuring the pressure for both tires. when inflating tires after unmounting the gauge from the tire, it loses some air pressure due to which internal air pressure also loses the actually recommended pressure of the tire. as a result the internal tire pressure is not accurate same as that of the expressed pressure of the gauge. it is hard to measure the exact tire pressure if the gauge is incorrect it is the reason mostly the recommended tire pressures are recommended in a set(30 to 40 psi or 40 to 50 psi)
Usually, in the first round of inflating the tire using a pressure gauge, it would not tell the exact pressure, after two to three rounds of inflating the tire, you can get the exact recommended tire pressure. on a normal basis, you can inflate the tire by using two to three pressures higher than the recommended tire pressure for gaining the best pressure. but there are much better and good pressure Guage pumps that measure the exact psi without losing any air after inflation. if you want to know about the accurateness of your pressure gauge pump you can inflate the tire and make a difference of 1 to 2 psi higher or lower from the recommended pressure and then check from another pressure gauge pump, you can get the pressure higher or lower which expresses and shows data about the previous gauge pump.
It is common due to inaccurate data of the gauges, many riders to use their palm and thumbs to check the tire and inflate or deflate the tire from the measuring point, floor pumps are used for this method, which is also cheap from the pressure gauges, but you will need the pressure gauges for mountain biking and aggressive trails which usually run with lower tire pressures. inaccurate inflation of tire pressures is usually felt on the trails mostly on downhill trails where you are coming down and you can easily recognize the up and down in the tire pressure, it is due to the faulty pressure gauge.
It is common mostly riders to use different pumps and different gauges so that these both are not compatible with each other, as a result, you will gain inaccurate pressure data. the main reason is that weight of every ride is different from the other, which would cause accurate data.
Difference In Tire Pressure In Gauges?
Usually, it has been seen a large difference in tire pressures roundabout more than +-5 pressure, and this 5 pressure is usually a large difference from the recommended pressure, it is easily felt on the trails when you are running on your bike and as a result sometimes the tire punctures and get a flat pinch, for beginners, it is hard to recognize this difference but pro and experienced riders would easily felt and recognize this difference.
If you are using the same pressure gauge pump for many years and months then maybe your gauge is expressing and measuring inaccurate data, find another correct gauge and compare them both by inflating and deflating the tires at required pressures after that you will gain the exact and accurate gauge.
There is a difference of +-2 to +-3 of tire pressure when you are inflating the tire from 30 to 35 psi and above this level the pressure also changes, these things depend on the recommended pressure of the tube and tubeless tires for maintaining their internal pressures.
Changing And Replacing Of Pressure Gauges Also Change Tire Pressures:
If you currently using a pressure gauge and you want to replace it with a new one, then it will also change the tire pressure due to the changing of gauge pumps, and you to maintain the recommended pressure on a new gauge after inflating the tire two to three times.
How To Judge Accurate And inaccurate Tire Pressure Without Gauge?
It can be done by an experiment performed on the trails after repeating 3 to 4 rides on regular basis on the trails with different tire pressures( higher or lower), there comes a usual and common pressure, which is giving you a comfortable ride and bike handling is smooth on the trails, it can be judges on the trails without using any gauge pumps. it is the pressure that you need in your tires constantly according to your body weight without interference from any pressure gauges.
In simple words, it could be used to say quotes for understanding in the right way.
Recommended pressure means what works on your bike by performing experiments repeatedly on the trails.
Experiment For Judging Inaccurate Tire Pressure By Using Gauge:
When you pop and adjust the pressure on the hose of the stem valve, then if the gauge is not accurate after every popping and adjusting of gauge you will get a different tire pressure, it happens usually because the gauge will leak air from the valve on every time when you connect it with the valve.
Mount and unmount the gauge pump with the valve of the wheel more than 7 to 8 times, you will constantly get a new pressure, and you will get different readings on the gauge, if all these readings are exactly the same then the gauge is correct but if all of the 7 to 8-time readings are inaccurate with different psi then the gauge is incorrect.
Mostly it happens after removing the gauge from the valve of the wheel, there is a small amount of air which leaks by making noise from the valve, most of the time it is not the internal pressure of the tire, it stays within the hose of the valve when you are inflating the tire, it confuses every rider about their tire pressures, this is the reason you can repeatedly mount and unmount the gauge with the valve and note all the readings to gain the correct and exact pressure for your tire.
What To Do If The Gauge Pump Is Giving A Wrong Reading Of Tire Pressure?
You will notice if the readings are wrong on the gauge then you can judge the tire pressure with your thumb, its a simple and easy way without spending time on it, because many times it happens if the gauge is showing tire internal pressure is 35 psi but actually it is not accurate reading then you can simply judge it with your thumb, it also saves your time.
Although the best and easy way is that if you have easy access to more than a single gauge then compare them all for checking the previous gauge pumps and maintaining the recommended internal tire pressure depending on the trails and your body weight.
Newly Purchased Gauge With Inaccurate Reading:
It is common when you have received a new gauge which you have shipped from any online store but it is giving wrong information when checking of tire pressure, it mostly happens in the shipping of this product, they do not care about the product, as a result, it starts giving wrong and inaccurate reading of tire internal pressures, you can send it back to the store if it has any warranty within 24 hours and orders another gauge from another online store.
You can check the sidewalls of the tires if it’s inflating higher than the reading on the gauge then probably the gauge is inaccurate.
Consistency And Repetitions Are More Important Than The Actual Recommended Pressure:
Consistency means you are comparing two to three gauges pressures on the same and exact tire and you are receiving different readings on all of these gauges and now you are confused about the actually recommended pressure of the tire, for this purpose you can repeat inflating and deflating the tire, and here comes the actually recommended pressure you are noticing which feels perfect for the tire, and ignore all the other gauge readings.
And the actual pressure is noticed from the sidewalls of the tires, if the tire is highly firm from its sides then its high pressure, deflate some air by continuously watching the gauge, and when you have stopped after recognizing and remembering the actual pressure on the gauge, that is the real tire pressure for the same gauge.
Tire Casings Would Also Matter A lot For Inaccurate Readings:
If you are thinking of the same pressure for thick and thin tire casings then you are not correct, because tire pressures would work differently for different types of casings by inspecting readings on gauges, there is another pressure for thick casings and different pressure for thin casings, this is usually noticed by performing repeatedly experiments on the tire by inflating and deflating the tire for gaining the actual pressure for thick and thin casings.
Always use the Same Gauge For Tire Pressure On a Regular Basis To Avoid Inaccurate Readings:
If you are not using one pressure gauge for inflation of tire after every 2 to 3 days or after 25 days or after 1 month, then you will always get inaccurate readings, no matter even if the second gauge is correct and newly purchased because using of one pressure gauge repeatedly would confirm and tells the actual pressure for bike tire but if you are using different gauges on different days, probably you will get inaccurate readings.
Recommended And Accurate Pressure Gauge For Your Bike Tire:
If you are looking for an accurate pressure gauge with a zero +- psi difference then the Topeak Digital Air Pressure Gauge is the most recommended gauge for bike tires.
You can compare this gauge with the other gauges surely in the end you will have accurate readings on this gauge after performing 7 to 8 experiments of inflating and deflating bike tires.