Isn't tire wear more so an effect of how much toe you have?
On my E46 M3, I ran -3º up front with 0 toe, rear was about -1.8º with slight toe in, for two straight years. Tire wear was very reasonable and conservative.
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F80 M3 DCT|Alpine White . Black Leather | My Build Thread
E90 M3 DCT|Melbourne Red . Speed Cloth | My Build Thread
E46 M3 6MT|Jet Black . Black Nappa Leather | My Build Thread
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