Great info, subscribed.
I think BMW lowered the width because of EPA standards...the farther out a rim is from the hub, the more drag and less efficient it'll be aerodynamically. Additionally, less wide=less weight.
2012 335i Mineral Gray
M Performance Whore: PPK|Exhaust|Brakes|Performance Suspension Struts & Springs|Black Kidney Grilles|CF Spoiler and Mirror Caps|M Sport 400M|BMWF30.com
335i brakes FS!