I'm just saying there is no alchemy. The lightest wheels are not the strongest wheels. In the default case a 20 pound forged wheel has a higher static load rating than a 16 pound forged wheel.
Is there a difference between the F30 unibody and the F80 unibody other than the roof? Or are those the same exact unibody, and the F80 weighs exactly 11 pounds less for the roof only? Did they use aluminum in the front clip?
Just so I'm being abundantly clear, I mean this diagram in its entirety (colored and silver parts) and nothing else:
__________________
WTB: 2016 M3 sedan, Black Sapphire, Extended Sakhir Lether, Ceramic Brakes, 19" black wheels, Lighting Package, HK sound, USB/Bluetooth
Sold: 2006 e90 325i 6MT, ground control coilovers, Remus exhaust