I just got a Carchet TPMS System for my 5'r which has max/min alarms for pressure and a max temp alarm. What would be good settings for these alarms given a load rating E tire? Baseline pressure is 80 psi cold (70 degrees). The sensors screw onto the stems, so I do realize the temperature readings probably are not close to inside tire temps.Max Pressure = ?Min Pressure = ?Max Temperature = ?Thanks in advance

Well this should be interesting.IMHO, that kind of a system is WAY too complicated because it gives users too much latitude to do unwise things.For instance, as long as you can SEE the current pressure on the display, there is really no good reason to constantly monitor pressure increases.

Our Class A calls for 90 psi cold. I check it on cold mornings and have the alarm set for 80. Since I'm always starting out at 90, if the alarm goes off, it's pretty likely something is wrong. I have the display in an easy to see location and make it a habit to glance at it on a regular basis. MUCH more peace of mind than routinely getting the tire gauge out (and not being sure if you picked up a nail right after you checked pressure).

You'll find that it's somewhat of a trial-and-error process as the operating characteristics of your tires will depend on the construction of the tires (all steel construction tires tend to run cooler), load, speed, ambient conditions, etc.With a cold inflation pressure of 80 PSIG, I'd start with max pressure = 95 PSIG, min pressure = 70 PSIG and max temperature = 158 degF (the latter is recommended by TST based on consultation with tire industry engineers). Then adjust as required.Rusty

RustyJC wrote:With a cold inflation pressure of 80 PSIG, I'd start with max pressure = 95 PSIG,I agree with setting the pressure loss alarm at -10.But if you set the increase alarm as above, or at any pressure really, what does it MEAN if you go over that.....and what will you do about it ?? Same thing for temp. increase......unless maybe only ONE tire consistently gets a LOT hotter than all the others, but you don't need an alarm to see that.

All good points. The main functionality I will look for is going under-pressure and rapid pressure decrease whle driving. This unit will do that supposedly well. The other data points, like you said are most interesting if they are unbalanced.I still will be using the good 'ole hand-held "pressure-thing-o-mometer". :-)

Need advice on setting TPMS alarms | Good Sam Community

13 Replies

RustyJC
Explorer
Dec 21, 2016
You'll find that it's somewhat of a trial-and-error process as the operating characteristics of your tires will depend on the construction of the tires (all steel construction tires tend to run cooler), load, speed, ambient conditions, etc.

With a cold inflation pressure of 80 PSIG, I'd start with max pressure = 95 PSIG, min pressure = 70 PSIG and max temperature = 158 degF (the latter is recommended by TST based on consultation with tire industry engineers). Then adjust as required.

Rusty
garyemunson
Explorer II
Dec 21, 2016
Our Class A calls for 90 psi cold. I check it on cold mornings and have the alarm set for 80. Since I'm always starting out at 90, if the alarm goes off, it's pretty likely something is wrong. I have the display in an easy to see location and make it a habit to glance at it on a regular basis. MUCH more peace of mind than routinely getting the tire gauge out (and not being sure if you picked up a nail right after you checked pressure).
Sam_Spade
Explorer
Dec 21, 2016
Well this should be interesting.

IMHO, that kind of a system is WAY too complicated because it gives users too much latitude to do unwise things.

For instance, as long as you can SEE the current pressure on the display, there is really no good reason to constantly monitor pressure increases.

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Need advice on setting TPMS alarms

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