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so am I suposed to go by the door plate, the owners manual, or the max side wall presure? my door plate says 34psi, my manual says 34psi UNLESS I'm going over 55mph and if I'm driving on the highway to increas my tire presure by 4psi, now my old tires had a side wall max presure of 36psi, my current tires are 51psi, and I check my tread depth every time I rotate tires, and tred wear is well within reason as far as uneven wear is concerned for the last 30,000 miles, so those steel belts seem to be doing their job.
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