i suppose i might understand the geometry of what you are trying to accomplish , on my 997.2 gt3 i run 235 (stock) and 305 or 315 30 19 in the rear. i just purchased a m6 coupe which will be my daily , i have 20x10 front and 20x11.5 rear .
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2014 CP M6
2011 Porsche GT3
2016 Dodge Hellcat
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