Which One Should I Use?
Minder makes two types of transmitters, the TM-2BRASS and the TM-2ALUM. The basic kits come with either 4, 6, or 10 of the brass style transmitters. RVs, motorhomes, 5th wheels, and trailers will all have either rubber (brass) or metal (steel, chrome, or nickel) valve stems, all of which work with the TireMinder brass transmitters.
All cars, SUVs and trucks will have either rubber (brass) or metal (aluminum) valve stems. If you have a rubber valve stem, you will need brass transmitters. If you have a metal valve stem, you will need aluminum transmitters.
What you want to avoid is called "galvanic corrosion." This happens when dissimilar metals come into contact for a period of time. Moisture (especially in salty environments) will cause the two metals to become so corroded that they cannot be separated.