I had someone tell me recently that even at 17.5KG per wheel (Rims + Tyre + Air) that it is still too "heavy". So the question is, when is it ever "light enough" ??? Rims are about 6 - 10KG depending on size so the rest is made up by tyres and air ......
I felt that the weight was ideal as once the car is rolling, it shouldn't matter how much the wheel weighs as we all know, acceleration consumes the most power. Once you are cruising, don't think the weight of the wheel matters. The air in it however, does! B)
Your 4 wheels is meant to keep you and the car on the ground anyways. Your not a piloting a space shuttle pulling away from earth's gravity which means you do not need your wheels to be anorexic. But each to their own ;)
Which comes to the article below ...... which will upset most but oh well, time to wake up and smell the 5h!ts ...
The article is about testing two different set of wheels using same car setup and tires. They were trying to see how lightweight versions of the wheel would compare to a more rigid one.
Enjoy
http://og-made.com/archives/1904