When I first got my wing I checked the air pressure in the tires every monring before heading off to work. At least once or twice per week I would have to add air to the tires. I bought the Smarttire system from Vulcan tire and installed it on my wing. Guess what? Since installing the monitor I have not had to add any air to my tires, and that was over 5,000 miles ago. Hmmm, why not I asked myself, then it hit me. Every time I used a tire guage I would loose just that little bit of air. Check it several times and it would add up to 1lb or 2 loss. Never had thougth of that before. Another advantage to a TPMS. Anyone else experienced this?