Dieting. Rim Weight? Which is lightest?

[Bruce2]

I think the problem with weight accuracy lies with the scale people use. The most common one to use is a bathroom scale. Very few of them are accurate. And they are more inaccurate at the low end of the scale. They were designed to weigh things in the 120+ lb range, not 12lbs. If you are using a bathroom scale, hold the wheel and stand on the scale. Then put the wheel down and deduct your weight from the combined weight. Better still, hold 2 wheels. Weighing 2 at a time halves the error. 3 or 4 is even better.
Some weights of wheels I have made that are not on your list:
Fuchs 4.5x15 11 lbs
Fuchs 5.5x15 12 lbs
Fuchs 6x15 12.9 lbs
Fuchs 7x15 (early) 12 lbs
Fuchs 7x15 (late) 13 lbs
Fuchs 8x15 14 lbs

Since its a known fact that the lightest wheel ever sold by Porsche is the 5.5x15 Mg Mahle, and the 4.5" Fuchs are 11lbs, the Mahles must be less than 11lbs.