How to tell time for new tires

[Badgertits]

Take a photo.

OR if this happens, you need new tires.

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BUT the stock ko2s lasted 55k
My current Falken AT3s are ******* amazing, nearly 100,000 on them and I have another 3/4inch tread.

How much of an mpg hit did that come w/ tho? It’s calculable though if you can get double the miles on the tire…that seems like a lot tho