"By the looks of things Zipp have had a fairly busy summer. They will present several things to the media and the Euro crowd in a few hours, and topping their tech list is tough, as they have revamped their wheel tech across the board and will also spring what is on paper, the highest performance cranks released anywhere to date in their new Vuma Quad…

Not satisfied with that, they’ve also come out with a wheel (The Sub 9) that, at 15 degrees yaw, actually produces NEGATIVE DRAG… No worries, as the tunnel numbers are also exceptional at 5- 10 and 20, but the tunnel data I’ve seen for these at 15 degrees is way cool... Minus 80 grams drag, so roughly 11 watts forward power!"

wtf!

http://www.pezcyclingnews.com/?pg=fu...50&status=True