Quote:
Originally Posted by Charlie Brown
If I can substitute "widest" for "optimal" on stock 20" M5 wheels and assume several track days per year, then I'm currently thinking the SC2 in 265/305 sizes. This is what I'll be running starting next spring. If track days are less important than wear and the tires will see a fair amount of wet weather, then it's the PS2 in 275/305 sizes. My .02ยข
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The car has alot of understeer, might want to consider dialing some out with tires a bit wider up front for a track set up.