[buzzcop63]

Use Tire Minder since June of 2013 on D rated Power King OEM tires for some 4,000 miles. Transferred May of 2017 to E rated tires at 80 PSI and 150psi rated stems, outer part metal, 830 miles on so far. Dealer said in Pacific Northwest due to rain that they quite using all metal stems due to corrosion. Tire Minder gives you PSI and temperature, I set pressure with hand held digital gauge, and difference between the sending units and digital hand gauge varies about 1/2 to 1 pound. Not only do you feel better with a constant knowledge of what each tire is doing you can also check tires while the trailer is in storage with out getting out of my truck. I also keep an excel spread sheet on readings to better understand what the outside temperature affect on tire PSI as well as if the tire is in the sun or also if it is the following tire, the front tire blocking air.