TPMS question

Question

I recently purchased a TST tpms system with flow through sensors. I now need metal valve stems for the trailer and the truck. Putting metal valve stems on the trailer is no problem but the truck is another issue.
Even though the truck has a factory tpms system, I want to use the TST system because I’ll be able to watch it in real time like the trailer. Using the rubber factory stems is not recommended by TST because they flex too much while at highway speeds causing air to escape from the stem where it attaches to the rim.
In Missouri (and possibly other states) it is illegal to disengage/remove factory tpms sensors located inside the tire. I had a nice discussion with my tire guy and he told me this, much to my surprise. I searched the internet and sure enough, it’s true.
Ram does not make a metal valve stem that attaches to the factory tpms so I’m searching for an aftermarket stem that does.
I’ve seen an aluminum stem at AutoZone that might work (I’ll have to compare it to the OEM rubber stem at the auto parts store) but I’ve read where the aluminum ones corrode too much and cause more issues.
Can anyone with this same issue tell me what you did?

bobbo · Answer

Drive to a state that doesn't have that law and get them changed there.

corvettekent · Answer

I solved that problem by buying a new Chevy truck that has an option for trailer TPMS. A low tire for the truck or trailer will show up on my info screen.

grit_dog · Answer

Or stop looking for a solution to a problem that doesn’t exist and use the perfectly good TPMS system that come with your vehicle that you can likely also watch in real time if you switch to that screen and watch it instead of the road.

Besides you will likely get an error message every time you start the rig which you may not have or want the ability to bypass. As well as you’ll have the low tire pressure idiot light forever guaranteed. Like taxes.

dodge_guy · Answer

You can use the TPMS sensors with the trucks factory stems. They are high pressure and have a reinforced brass insert inside the rubber. I use the TST sensors on my Explorer and my Ram which have the same stems. I don’t use flow through sensors though as they are just too long and bulky. I use the cap sensors which are smaller.

fj12ryder · Answer

I would advise to avoid the flow-through sensors. They are pretty much a PIA, as the flow rate to add air is very slow. I remove the sensors to add air because of that reason.

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