What TPMS should do...

I can see air temperature difference from one side of the trailer to the other, depending on direction of the sun and my travel direction. Black tires can get 10 degrees or more hotter when facing the sun verse being on the shade side.

My Eeztire will alert me in an instant to any tire losing significant pressure, and shows that one wheel often runs a few degrees hotter than the others. I assume that's correct..I do check temperature frequently.

That's a pretty bad mishap you had there.. something I dread almost every time I drive.

On the one I have you can set temperature parameters. Other than this one time, I've not had any heat issues so I don't know if there is an audible warning or not.
Actually, I think the unit I have is real crappy. I can unhook the trailer an an hour later it is still showing me that the trailer is connected and I'm showing tire pressure even if I'm miles from the trailer! A wheel could fall off and there would be no notification!

It's a TST brand unit......

Rbertalotto wrote:
I had a hub get so hot after a brake wire shorted out that it melted the entire inside of the hub out! And I never got a high temperature warning with the TPMS.

Is it set to give a warning, or just show the temperature? Mine don't have a high temp setting.

NOPE...It doesn't. I had a hub get so hot after a brake wire shorted out that it melted the entire inside of the hub out! And I never got a high temperature warning with the TPMS. My diesel tow truck never skipped a beat. Had no idea it was happening until I pulled in for fuel. Luck would have it I was directly across from a trailer fabrication place in Bakersfield CA! Needed a whole new axle with new hubs.

GrandpaKip wrote:
Not sure, but I would think that if a hub is going, it would show as higher temps on the TPMS.

I would think so too. Wheel is metal, valve stem is metal, so it should show up as heat on the sensor.

TPMS sensors need pressure to operate. They won’t send a signal with no pressure.
That’s getting to far into worrying about everything! Grease them every other year and you should never have a problem.

Not sure, but I would think that if a hub is going, it would show as higher temps on the TPMS.
Unless it fails catastrophically. Then nothing is going to warn you in time, like a road hazard blowout.

TMPS is designed to measure air temperature, not surface temperature, AFAIK.
If you're worried about bearing temperature, I recommend a laser temperature gun fro Harbor Freight.

I believe all TPMS units do “tire” temperature. I’m asking why they don’t offer “Hub” temperature. Lots of folks have more issues with hubs than tires. And an early warning that a hub is overheating just might save the day.