EVOL Air Chamber
The infinitely adjustable pressure setting in the extra volume (EVOL) air chamber regulates spring rate in the final portion of the stroke and controls the bottom-out characteristics of the shock.

Take your riding to the next level of performance and adjustability. The spring rates can be easily adjusted for your riding style and terrain. Fine tune your ride height and plushness independent of your bottom-out resistance and roll stiffness. Inside the anodized 6061-T6 aluminum, bodies the application-specific valving will soak up even the hardest of terrain. Turn the rebound adjuster to fine tune shock action to the terrain and your riding style.

The infinitely adjustable pressure setting in the extra volume (EVOL) air chamber regulates spring rate in the final portion of the stroke and controls the bottom-out characteristics of the shock.

The rebound knob allows you to tune the damping rate on the extension stroke in order to optimize control in all conditions.
One of the most significant components in any shock is its piston and valving … they are the heart of any damper. Every shock in our lineup utilizes our race-proven Velocity-Sensitive Damping Control technology. Through the use of different piston flow designs and variable valving specifications, we are able to custom tune each shock for its intended application.
Working closely with one of the word's leading seal suppliers, FOX Racing Shox has developed our unique dual stage Samurai Sealing System (SSS) for use on all FLOAT 2, FLOAT X, and FLOAT X EVOL air shocks. The seals in the SSS are specifically designed from a special low-temperature, highly durable material that scrapes away snow, ice, and debris while simultaneously keeping the seals lubricated for minimal friction.
Air springs provide a number of distinct advantages over their coil spring counterparts in the right application. They give a progressive spring rate, are infinitely adjustable, and provide a significant weight savings.
Use our Dealer and Distributor listing to find an outlet near you.