The Intelligence Behind FOX 3.0 Live Valve X2 For RZR

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The long-running UTV partnership between FOX and Polaris has resulted in the DYNAMIX Dual Valve (DV) system, which is specifically designed to take advantage of the new FOX 3.0 Live Valve X2 shocks on the 2022 RZR Pro R Ultimate and Turbo R Ultimate.

How it works

This semi-active suspension system gathers real-time data from accelerating, braking, steering, and inertial sensors every few thousandths of a second. It then electronically adjusts compression and rebound damping in each of the four 3.0 Live Valve X2 shocks.

In some shocks there’s a dependency between compression and rebound adjustments. When the oil flows back and forth between the body and the reservoir, it moves through the same path. This means any adjustment to one technically affects the other.

But Live Valve X2 shocks are independent. Oil flows through one adjuster during compression and a second adjuster during rebound.

Independence matters

This independent adjustment of compression and rebound damping is useful in a variety of situations. For example, when you begin to turn, DYNAMIX DV informs the outside shocks to adjust differently than the inside ones.

Read “Next-Gen FOX Live Valve Takes Off-Road Race Tuning To New Heights

For the outside shocks, compression damping increases (to prevent the chassis from rolling to the outside) while rebound damping decreases (for better traction). During this same fraction of a second, the exact opposite happens to the inside shocks: compression damping decreases (to maintain traction) and rebound damping increases (for the chassis roll).  



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Now, say you were to accelerate through a turn. Your front shocks would adjust separately from your rear shocks, with the front ones increasing rebound damping, and the rear increasing compression damping. This will help keep your chassis level through the turn; not just side-to-side, but also front-to-back.

Another example is when you go off a jump and land, three unique adjustment phases to your shocks take place:

  1. First, while you’re airborne, rebound damping decreases so your shocks are fully extended and ready to absorb the impact. In addition, compression damping increases so you won’t bottom out when you land.
  2. Second, as soon as you hit the ground, the compression damping is held in its increased state to absorb the landing forces. Also, rebound damping increases to stop the springs from bouncing you back up — keeping you firmly planted.
  3. The third adjustment happens as you drive away from the landing. Your compression and rebound damping are independently optimized to your current driving situation.