On stock wheels and suspension I'd suggest 265/35 fronts and 285/35 (or 295/35) to get grip the RE71R is great but loud. MPS4S is also great but not loud, and comes in 295/35 for rears too.
I've run 275 up front but steering felt heavy. When I ran the 295/30 rear it looked short.
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'18 F80 Base 6MT | '19 F82 Exec DCT | '18 F82 Comp Exec DCT | '23 G80cx
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