Have Michellin tires - 4yrd old with 34k mileage - today Firestone gave me thread reading of
3 6 2 (front) and
2 7 1 (rear)
Outer, Center and Inner, in that order. And tire pressure of 32 and 31 (rear)
They tell me that it has been driven with low tire pressure. I went to America Tires on 10/30 for rotation (ie 25 days ago) - they inflated to 35 front and 33 rear (though, I do not see them doing). Don’t know why front lost more psi than the rear.
I am seeking tips in maintaining my tires. Thanks.