Originally Posted by swamp2
Darn I'm bored...
The configurator on bmw.com that shows color choices and the 18/19 wheel choice shows a definite widening of the rear wheels (to the inside only actually) which is visible when you swap back and forth between 18 and 19 while looking dead on at the rear. I wonder of the tires fitted to the 19s will indeed be wider. This effect is not seen from the dead on front view with the front tires. This car needs every bit of rubber width on the rear that will fit. Hmmm.
No, it's an illusion--both 18s and 19s are the same width.