Market News. “When we introduced the 900 we changed expectations for disc wheels. We demonstrated that they didn’t have to weigh as much as a small dog while offering the stiffness necessary to perform under the world’s greatest cyclists. At just 936 g with a cassette hub, the 900 is light enough for the hilliest triathlon or time trial courses.
The Zipp® 900 disc remains one of the lightest, stiffest disc wheels in the world and was still more than fast enough to help Kristin Armstrong to victory in the 2008 Olympic time trial”.