Originally Posted by Andrew@ActiveAutowerke
This is true. Our 20's are the same weight as the stock wheels and produce 20 whp less.
This is the reason trackday guys and race teams will use the lightest and smallest wheels possible, that the brake system allow. Once upon a time, when I had my GT3, the serious guys would spend thousands and thousands on titanium wheel nuts by an italian company NCR and carbon fiber wheels by Oakley. Unsprung mass has the single most major effect on a cars performance in every way, accel, braking, turning, power loss..