Minder Research TireMinder TM-A1A, Operating Manual

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Remember, you may only find aluminum valve stems on a car or light truck which has a factory installed TPMS.
We gather from several phone calls that the above explanation is difficult to comprehend. For this we apologize
and will try to put it in simpler words:
 If your towed vehicle (that’s the thing you are hauling behind your motorhome) has metal valve stems,
you need TM-2ALUM transmitters.

If it has black rubber valve stems, you need TM-2BRASS transmitters.

Your motorhome, 5 th wheel, trailer or tow dolly will use what comes in all TireMinder® kits (Brass). Yes,
even if you have those big 22.5” shiny aluminum wheels, you will need Brass transmitters.
If that’s still not clear, well, you are just going to have to call us (we really don’t mind).
If you have purchased or received the wrong type, simply contact Minder Research and we will arrange to
exchange them at no charge.
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