Here's the thing you are forgetting about the PSS or PS4S. They have a mileage warranty. If you have a staggered setup, it's 15k miles. Square is 30k. If you can keep the wear within 1/16th of an inch across the tire with no abnormal wear, you can pro rate the next set if you wear them out early. That cuts their price in half for the next set if you drive like me.
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