What needs to be kept in mind about TPMS units is that RVs of all types are generally driven long distances each day, unlike a car where you might just drive to work or the store. With the car, you pick up a nail and you come back out to find a flat tire. With an RV, the pressure might have been good when you checked it in the morning but you pick up a nail and you will drive far enough for it to leak down to the danger point where the tire will overheat and fail. TPMS is more important on RVs!