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What tire pressure numbers to trust (deflator gauge or on-board tire pressure computer)?

Discussion in 'Off-Roading & Trails' started by xmt037, Sep 6, 2021.

  1. Sep 6, 2021 at 11:39 AM
    #1
    xmt037

    xmt037 [OP] New Member

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  2. Sep 6, 2021 at 12:28 PM
    #2
    Thatbassguy

    Thatbassguy New member? Really??

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    The only thing I could recommend would be to try another gauge and see if it matches one or the other. I don't tend to trust digital gauges.
     
    The last breed, Toy4X4 and Mtbpsych like this.
  3. Sep 6, 2021 at 12:32 PM
    #3
    Mtbpsych

    Mtbpsych New Member

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    I use those cheap tire gauges from Walmart. I think it’s $4 for a metal gauge instead of the plastic gauges.
     
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  4. Sep 6, 2021 at 12:47 PM
    #4
    Moon Landing

    Moon Landing AFFTC 1967/68 Eddies Air Patch

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    It's a 200psi gauge with an accuracy rating of + or - 1% per 100 psi. For true accuracy you need to compare its reading to at least one or two other gauges. Preferably gauges that top out below 100 psi but within your intended range of inflation.
     
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  5. Sep 6, 2021 at 5:13 PM
    #5
    Daddykool

    Daddykool Photography enthusiast

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    Probably an exercise in splitting hairs at this point. In all my years of driving, I’ve yet to see any direct correlations between reasonable tire inflation pressures and tire wear, mpg or handling. If you go with the computer’s readings, at least your vehicle will have that info on board in the event of an accident. But personally, I’ve never sweated that detail.
     
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  6. Sep 12, 2021 at 12:37 AM
    #6
    Kwikvette

    Kwikvette New Member

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    I've used an ARB deflator for years now and have always had accurate readings compared to a higher end setup I'd compare it to.
     
  7. Sep 12, 2021 at 3:43 AM
    #7
    Toy4X4

    Toy4X4 New Member

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    The gauge you list on Amazon says " it's performance tested and highly accurate", do you feel the same about the 'onboard' TPMS? Exactly.. We use a gauge, and we use the same gauge all the time, that somewhat eliminates variations instead of using different gauges periodically. We also notice a difference in the TPMS and our gauge, give or take a couple of pounds.
     
  8. Sep 12, 2021 at 11:47 AM
    #8
    DRobs

    DRobs New Member

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    Pinstripes, lots of em. Plus a couple dents.
    I use a Viair tire deflator. Works good. Not super fast but not that slow either.
    Screenshot_20210912-144706_Amazon Shopping.jpg
     
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