Cupping is usually a sign of the tires not being rotated correctly and improper wear. Honestly, I don't think you're on to anything. Don't ever rely on your TPMS. Always check the pressure in your tires manually, the old fashion way.
Thank you Roger, I am thinking that the tire pressure sensors in my 13 ram may be the culprit in tire cupping. I had an alignment at 6700 miles and the alignment was fine. In my opinion there is too much counter weight to balance out the sensors. All four wheels were out of balance however. I rarely get up to highway speed, so it's hard to tell when the wheels are out of balance. Does anyone think I may be on to something ? Mac
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