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Old 04-17-2021, 06:41 PM   #1
Nankipoo
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All these tire pressure threads. What gauge you use.

Thread after thread of correct tire inflation. I try to run mine at max cold psi. I got 10 different gauges and they all read different. What's an accurate gauge that won't break the bank buying one. My Ram has TPMS and none of my gauges will read what the TPMS says to the same pressure. So on the 5'er I'm just trying to guess close.
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Old 04-17-2021, 07:23 PM   #2
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Myself, I use a 0-150# dial pressure gauge. The dial type gauge is properly known as a bourdon (not bourbon!) tube gauge and are usually very repeatable in the center third of the indicated span (50 to 100#) with a variance of about 3% . Can't remember which parts store I bought it, but are usually available at most car parts stores. A 0-120# gauge is also very repeatable in the 40-80# range but with my RV tires and truck rear tires at 80#, I would rather have some over-range ability. But even if you can only find a 0-100# gauge, the variance of the upper and lower third of the range is only about 10% of indicated pressure. Example, if 80# is indicated in the upper third of the range, actual pressure may by anywhere from 72 to 88# while in the center third the pressure variance would be between 77.6 to 82.4#.
My Ram TPMS transmitters are nearly six years old and are starting to drift. I hope that this helps!
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Old 04-17-2021, 09:37 PM   #3
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Don't drive yourself nuts!
Pick one of your 10 gauges & use it every time. A pound or 2 difference won't make a bit of difference in the ride, tire wear or load carrying capabilities.
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Old 04-18-2021, 12:16 AM   #4
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I have an old oil filled 1-160 psi pressure guage that I keep in the garage that I use as my control. So whatever guage I carry with me I compare to that "control". Whatever variance that there is at 65 and 80 psi I mark on the back of the guage. So lets say the combination lever inflator guage reads 5 lbs less than the control at 80 psi then I write on white blank label 80 add 5 and apply the label to the back of the guage. This also allows me to know if bouncing around in the tool box has caused any issue later on.

I don't obsess about the accuracy as I'm not playing NASCAR pit crew. I typically check a new guage to my "control" then maybe check against it once a year (usually in the spring) if I think about it (translate, if I'm bored out of my mind with spring fever}
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Old 04-18-2021, 04:11 AM   #5
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I have one tire gauge I keep in the glovebox of my truck. I use it for all my vehicles and trailers. I've had it for over 30 years and still use it. Is it accurate? I have no clue. I just use it. Unless you work for the official government "Weights and Measures" department and use their equipment, anything you purchase over the counter will never be 100% accurate.
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Old 04-18-2021, 04:40 AM   #6
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This one matches my RAM TPMS and TireMinder i10 TPMS. I don't know that it means its accurate but it matches. https://www.menards.com/main/tools/a...831804&ipos=22
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Old 04-18-2021, 05:04 AM   #7
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As stated above, complete and total accuracy is not necessary as much as repeatability is. To be off by a few psi is not life and death in truck and trailer numbers. Back when I was doing motorcycle track days and on some of the tires I ran, 1/2 to 1 psi was critical, and as such, I paid almost $100 for a Longacre gauge that was tested to be within 1/2 of 1% error. At 30 psi, that works out to .15 psi. So in that case, I absolutely needed the accuracy.....with truck and trailer tires....not so much.
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Old 04-18-2021, 05:34 AM   #8
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I think keeping all of them consistent is the best option, as others have pointed out,you could have 10 gauges to choose from and most all would be a little different. It’s the same with home heating and cooling thermostats ( most have a way to correct for deviations..real or perceived)
And as soon as you start driving or the temperature rises or falls then your psi changes as well.. I usually go by my vehicle tpms to adjust for handheld gauge correction.
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Old 04-18-2021, 06:33 AM   #9
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If you tow (or not) on a bright sunny day, and stop to check the tire temperature/pressure in your tires after a couple hundred miles of travel, you'll quickly realize that there will be a 10-20 F difference in tire temperature between the "sunny side tires and the shady side tires". The same goes for pressure readings in the tires. The ones in the sun will read "noticeably higher pressure" then the ones in the shade.

So, if "that much variability" is common and expected and repeatable in almost all driving situations, just how "critical is the operating pressure and how do (or how can) you keep all the tires equal??? Better question: Since we know the tire pressure is going to be significantly different when operating the tires, just how important is it that all the tires have "exactly the same pressure at the start" ???

Quick answer: They don't....

Here's a link to the American Society of Mechanical Engineers requirements for accuracy in pressure gauges. https://www.instrumart.com/pages/539...ccuracy-grades

Looking at the "accuracy requirements" in both mechanical pressure gauges and in digital pressure gauges, the "bottom line" (no pun intended) in both types of measuring devices, for commercial applications (use in business and sold for commercial use) is +/- 2% for digital and 5% for mechanical gauges.

These "accuracy standards" are "always measured " under very specific environmental conditions: a temperature of 73.4°F and barometric pressure of 29.92 in Hg... Who has that kind of control over the environment when checking tire pressure in a campground or at home before starting a trip??? More importantly, who stores their tire gauge "based on environmental conditions" ??? Most are tossed in a door compartment or in the glove box in the truck..... (And that's "good enough for truck tires").....

I found a Craftsman digital gauge that "fits my hand and is easy to use" and that's my "go to gauge" for all my tires.... That is, with the exception of my tractor tires which are filled with beet juice, and that stuff will "muck up any gauge" so I buy a 99cent gauge at WalMart every couple of months, check the tractor tires and promptly toss that gauge in the trash.. At 6MPH, hauling a bushhog through the field, that 99 cent gauge offers "more than adequate" accuracy...
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Old 04-18-2021, 06:44 AM   #10
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John......well, you just can't hide money....a new gauge every couple of months!
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Old 04-18-2021, 07:17 AM   #11
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John......well, you just can't hide money....a new gauge every couple of months!
Yep, I suppose I'm going to "break the bank" buying dollar air gauges (or make the local WalMart the best producing store in the entire chain......

That said, trying to "clean a $1 gauge using $5 worth of paper towels, alcohol and brake cleaner"... Well, I suppose it's really "cheaper to throw it away rather than try to reuse it" And trust me, I tried to "make them work the next time with absolutely no success"... LOL

As a comparison, a farmer down the road NEVER checks his tractor tire pressure. He looks at the tires and if they aren't flat and ain't leaking "beet juice" he's "good to go".... I suppose there's something to be said about "saving a buck at WalMart", eh ??? I just can't move that far away from my old airplane inspection days..... LOL
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Old 04-18-2021, 07:26 AM   #12
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Yep, I suppose I'm going to "break the bank" buying dollar air gauges (or make the local WalMart the best producing store in the entire chain......

That said, trying to "clean a $1 gauge using $5 worth of paper towels, alcohol and brake cleaner"... Well, I suppose it's really "cheaper to throw it away rather than try to reuse it" And trust me, I tried to "make them work the next time with absolutely no success"... LOL

As a comparison, a farmer down the road NEVER checks his tractor tire pressure. He looks at the tires and if they aren't flat and ain't leaking "beet juice" he's "good to go".... I suppose there's something to be said about "saving a buck at WalMart", eh ??? I just can't move that far away from my old airplane inspection days..... LOL
I know, just giving out a little grief this morning.....carry on!
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Old 04-18-2021, 08:19 AM   #13
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I know, just giving out a little grief this morning.....carry on!
Yessir.... I'm about to be "relegated to making a trash run" so might as well "get my grief on" LOL Spring cleaning is "HER" focus while mine is "clearing trees, filling erosion down by the lake and getting things ready so I can mow when "HER" focus becomes, "let's plant some flowers"....

Sometimes I wonder when I even find time to buy a pressure gauge and check tires For sure, retirement isn't leisure.... Seems I work harder 10 years into "nothing to do" than I did when I was working full time....
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Old 04-18-2021, 10:17 AM   #14
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Yessir.... I'm about to be "relegated to making a trash run" so might as well "get my grief on" LOL Spring cleaning is "HER" focus while mine is "clearing trees, filling erosion down by the lake and getting things ready so I can mow when "HER" focus becomes, "let's plant some flowers"....

Sometimes I wonder when I even find time to buy a pressure gauge and check tires For sure, retirement isn't leisure.... Seems I work harder 10 years into "nothing to do" than I did when I was working full time....
All I'm going to add is to remember the S.W.M.B.O.
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Old 04-18-2021, 12:46 PM   #15
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I have used these gauges for the last 40 years. They withstand lots of abuse and even have a Zero adjustment.
I especially like that it will let me know what I am if I subject it to more pressure than it's supposed to see.
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Old 04-18-2021, 05:05 PM   #16
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I have used these gauges for the last 40 years. They withstand lots of abuse and even have a Zero adjustment.
I especially like that it will let me know what I am if I subject it to more pressure than it's supposed to see.
Dang, I got a bunch of them gauges laying around off old hvac hoses that finally gave up. Never thought about one of them. I been looking at the Craftsman digital gauges. May just get one of them and call it a day. I'm probably over thinking the thing but after having a blow out it makes you think about it.
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Old 04-18-2021, 06:26 PM   #17
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This is the one I have. https://www.sears.com/craftsman-prog...p-02830048000P When I bought it (15 years ago) it cost about $10. Of course back then, a Big Mac was $1.29...
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Old 04-19-2021, 05:38 PM   #18
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This is the one I have. https://www.sears.com/craftsman-prog...p-02830048000P When I bought it (15 years ago) it cost about $10. Of course back then, a Big Mac was $1.29...
That one appears to be out of stock everywhere or discontinued. The new Lowes Craftsman is 10 bucks but looks Cheaper made than that one.
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Old 04-20-2021, 07:22 AM   #19
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That one appears to be out of stock everywhere or discontinued. The new Lowes Craftsman is 10 bucks but looks Cheaper made than that one.
It's available "almost everywhere" (without the Craftsman logo)...

Just do a Google Search for "Model # MS4376 gauge" and you'll get several links.

Here's a couple:

https://www.summitracing.com/parts/o...caAmwhEALw_wcB $19.99

https://www.amazon.com/OEMTOOLS-2480...62740122&psc=1 $21.99

Don't buy it "because I recommend it", but if it's the one you want, it is still available "from places other than Sears"...
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Old 04-20-2021, 08:06 AM   #20
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I've carried an older version of this Milton for close to 40 years... still works

https://www.miltonindustries.com/gau...kpa-0-8-11-bar
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