Originally Posted by zpower86

Mine are 275 square. My fronts wear much faster due to autocross.

If I'm remembering correctly, I have about 55 autocross runs on them and under 700 highway miles.

Here's a pic 6 runs ago. I'd say 40% useful tread life left...maybe more. Rears prob are probably at the halfway point.

So according to this, the fronts are good for about 100 aggressive autox runs Ina 3300lb car.





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