Originally Posted by David@ApexRaceParts
Those would be 18x9.5" ET22 and 18x10.5" ET27, paired with 265/35/18 and 285/35/18 Michelin Pilot Super Sports. Not many tire manufacturer's make a 295 in the 18" diameter, but if you have found one it should work. The 285/35/18 is a popular choice for the 18x10.5" ET27 in the rear of an e9x M3 though.
I believe it has F & R spacers though.