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Discussion Starter #1 (Edited)
I had a TPMS kit installed when theses were put on by discount tire. Is that a kit for a different psi or just for removing and refitting?
 

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IIRC for removing and refitting, could be wrong though.

As for proper tire PSI, that depends on a lot of things (extra vehicle weight, weather, etc). I run load range E 255/85r17s and run 41 PSI up front and 42 PSI at the rear. This has shown to be the best for my truck and tire, as it is set up currently, via chalk testing. The best thing you can do is start around 40 PSI, which is about the average of what I've seen on E range tires, and tweak it from there with a chalk test*.

*Google "Chalk test tires". I would provide a link, but my phone is being moody.
 
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