275/30/19 will work but it's a little wide for a 9" wheel. I would recommend 255/35/19's for the front and 275/35/19 for the rear which will be a better match for the 9" and 10" wheels.
'04 E46 M3 - Jet Black - Sold
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'13 E92 M3 - Alpine White - Ohlins TTX, Fall-Line Suspension Arms/Bushings, AP Racing BBK, OE GTS Aero, Cobra Seats, Akrapovic GT4, GMG 4-point, BBS E88