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Old 04-25-2016, 01:46 PM   #1
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TPMS question

Do you go by your tire gauge to set your pressure or do you go by your TPMS.
My gauges and my TPMS vary quite a bit. I've been using my TPMS reading to get my pressures. It seems to be more accurate down to the last pound. By the gauge none of them are exactly the same pressure according to the TPMS. Advice? Thanks
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Old 04-25-2016, 02:00 PM   #2
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Quote:
Originally Posted by TS192 View Post
Do you go by your tire gauge to set your pressure or do you go by your TPMS.
My gauges and my TPMS vary quite a bit. I've been using my TPMS reading to get my pressures. It seems to be more accurate down to the last pound. By the gauge none of them are exactly the same pressure according to the TPMS. Advice? Thanks
OHHHH, NOOOOO!! Another TPMS question! (Having started one or two of my own.)

The answer is: both. You start with the most accurate tire pressure gauge you can get your hands on. No cheap plastic ones. Compare that to your TPMS. Go from there. Maybe your TPMS allows you to calibrate, for example. I felt really good when I compared my tire pressure gauge to the readings I got from my TireMinder TPMS and found they were almost identical. Kinda liked seeing that.

Also, my little 12v Harbor Freight tire pump agrees with both of them, which made me even happier.

Roger
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Old 04-25-2016, 03:24 PM   #3
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I would never go by the TPMS indicated pressure! I use a good commercial tire gauge!
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Old 04-25-2016, 04:00 PM   #4
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I set my psi using a gauge and then note any variance by tire with the TPMS. After that, it's strictly TPMS.
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Old 04-25-2016, 07:51 PM   #5
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I had a nice free afternoon today to piddle with it and yes, the gauge is the measurement to use. Also I looked up the spec sheet for mine (eeztire) and the accuracy spec is +/- 1.5 lb. I would imagine their all about the same in that aspect. Using 2 different commercial gauges to measure they were both dead on with each other and both were off about -5 lb with the TPMS which reads a lower pressure than the gauges. So from now on I will set pressures with my gauges and just reprogram my alarm settings on the TPMS. Thanks as always to all.
Happy Motoring....
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Old 04-25-2016, 08:11 PM   #6
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I am in the same boat as ts192.
All 6 of my TST senders show 4 pounds under my favorite gauge.

And this gauge matches the TPMS numbers that the jeep reads.

Convinced that TST units are low, but as long as you kniw tge difference, you can set alarms correctly.

Regards,

Dan
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Old 04-25-2016, 08:20 PM   #7
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I bought a certified gauge at NAPA some years ago. I never use it to do anything but check the other gauges. Our SmarTire TPMS seems to be close enough that I don't worry about a little bit of difference.
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Old 04-25-2016, 09:51 PM   #8
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Get a good pressure gauge. Use it to set the tire pressure. Once you've done that compare what your TPMS is reading hen you'll have a base for using it. However, that does not mean you shouldn't use the gauge. You still need to do that.
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