Caution: Not all rims work with the RAM TTPMS valve sensors/stems.
I had new G-rated tires installed on my 5th wheel today, and brought along my RAM supplied sensors for the TTPMS system. No matter what we tried, the threaded length of the stems wasn't long enough to work on my HD aluminum trailer rims. The rims were too thick, so when the stems were installed, there was not enough threads on the outside to get a bite on with the stem nuts. They are apparently designed for steel rims, and may work on some thinner aluminum wheels.
I may check with Schrader to see if they make a stem with a longer threaded section, but I have already spent too much on the stem swap and would rather put any additional expense towards a real TTPMS that monitors both PSI and Temp.