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JKJavelin

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Posted: 04/17/19 08:39am Link  |  Quote  |  Print  |  Notify Moderator

What matters most in a TPMS is consistency and its ability to see the pressure drop is its main job. Use a good quality gauge for cold air pressure. When going down the road, watch for fairly consistent pressures and temperatures occasionally. The actual pressure itself on the TPMS is secondary as long as all tire readings are close to each other.
JK


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jkwilson

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Posted: 04/17/19 10:29am Link  |  Quote  |  Print  |  Notify Moderator

JKJavelin wrote:

What matters most in a TPMS is consistency and its ability to see the pressure drop is its main job. Use a good quality gauge for cold air pressure. When going down the road, watch for fairly consistent pressures and temperatures occasionally. The actual pressure itself on the TPMS is secondary as long as all tire readings are close to each other.
JK


Agree 100%. As an engineer, I was always concerned with accuracy, but in a lot of cases, repeatability is far more important and much, much less costly.


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Posted: 04/17/19 03:55pm Link  |  Quote  |  Print  |  Notify Moderator

I use a quality tire gauge to set all of my trailer tires to the same cold pressure, then monitor them with my TPMS system. Usually they are within a few pounds of the set pressures, unless they have been sitting in the sun for awhile. Once on the road the pressures vary from tire to tire just a bit, but never more than 3-5 pounds.

wilber1

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Posted: 04/17/19 06:13pm Link  |  Quote  |  Print  |  Notify Moderator

JKJavelin wrote:

What matters most in a TPMS is consistency and its ability to see the pressure drop is its main job. Use a good quality gauge for cold air pressure. When going down the road, watch for fairly consistent pressures and temperatures occasionally. The actual pressure itself on the TPMS is secondary as long as all tire readings are close to each other.
JK


I agree. I set the pressures with a gauge and rely on the TPMS to let me know if there is a big change. Pressures when running will change according ambient temperature, to how much weight a tire is carrying, which side of the rig is facing the sun etc.


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rbp111

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Posted: 04/18/19 08:43am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the input. I guess the TPMS is doing what it is supposed to be doing, i.e. note a change in tire pressure.
I guess I will leave it alone.

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