Buy a 90mm lug conversion kit and go at it. The fronts are 7.5, rears are 8.5. I did 205's up front & 215's in the back with 20mm spacers all around and slightly rolled fenders and never had issues. Your going to have to find out what look you want and how low you want to go. If you want to stance and poke, spend money on some better/wider wheels. 8.5's with a 195 and -3.5 camber out back looks stupid as fvck, like your riding on motorcycle tires.
1995 325i 5mt ArcticGrey/Dove - SOLD
2004 330ci ZHP 6MT SilberGrau/Black - SOLD
2001 330i M-Sport 5MT StaulGrau/Grey - SOLD
1992 Accord LX Sedan 275k miles all original - DAILY
2002 Chevy Suburban LT Autoride - TOY HAULER
2005 GMC Sierra 2500HD SLT - RACE TRUCK!