Originally Posted by Pete'sMH
I considered a similar product as I found it very difficult to check the tire pressure on both the inside and outside tires - mostly due to he wheel simulator. Many people report good results but many do not. Instead I purchased longer, rigid metal valve stems. Cost $110 for the set of four (Online from Your Tire Shop in CA) and an additional $100 to have a local tire shop install them. Expensive, but so far they are working great. Good luck!
Appreciate the info, checked them out, will definitely consider getting a set...my question is did you take it to RV dealer or semi truck repair /tire shop...my local RV dealer is not to helpful when I talked to them about checking tire pressure or installing extenders...my next move will be to talk to semi truck repair shop....