So, wait...what do you mean the front was "too wide?" Is it hitting the strut? Hitting the fender? Would the tires have fit if it weren't for the offset of the rim? Would the wheels have fit if it weren't for the height of the tires? etc. You're leaving out some details here...
2007 E90 335i - Automagic - Non sport /// Cobb AP - Alpina Flash
Summer: Sonic Tuning ST100 - 18x8.5 ET35 - Conti DWS 245/40/18 - 10mm rear spacers
Winter: Style 159 - 17x8 ET34 - Michelin X-Ice Xi2 225/50/17 - 15mm rear spacers