Lurking inside the DYAD are two different shocks - one short travel (Elevate) and on long travel (Flow) - which allow you to completely change your bike's performance on the fly.
Flow Mode (Long travel)
Each mode has its own dedicated damping circuit, tuned for that travel. The Elevate circuit is tuned for maximum efficiency for climbing and flats. The Flow circuit is tuned for maximum plushness and control. In either mode, the other mode's circuit is completely closed so it can't interfere with the proper dampen performance.
The pull-shock design keeps the shock's weight centered just above the bottom bracket, giving the bike exceptional stability and agility.
The Elevate mode has a steep, progressive spring rate which delivers great traction as well as great pedaling efficiency. The Flow mode has a flatter, more linear spring rate which delivers a plush, predictable suspension for high speed descending.
Jekyll and Trigger each get their own version of DYAD with custom stroke lengths, custom air volumes, and damping dialed for its intended riding style by the masters at FOX.