Yes, TireMinder Transmitters may be used on high quality rubber valve stems. However, we highly recommend brass or stainless steel valve stems.
Due to the fact that rubber valve stems deteriorate fairly quickly, e.g. they should be replaced when replacing your tires, an external TPMS sensor can exacerbate the deteriorating by adding weight to the valve stem.
Additional rubber valve stems issues are based on age, length and physical location (i.e. exposure to road salt, high heat, sun, etc).
If using rubber valve stems, it is recommended that you check the condition of you rubber valve stems on a regular basis. Failing to do so will result in a tire failure.