This is a proprietary material developed by Edco for use in rim construction.
9K refers to the 9,000 strands of carbon fiber specified per tow, or bundle. The fibers are then hand woven into a unique 8mm Twill pattern. The result is an extremely strong and stiff material with a fiber areal weight (FAW) of only 150 grams.
The Twill pattern also prevents damage from propagating through the rim structure. 9K-8mm Twill Weave is used in our SuperSport and AeroSport range.