FOX FLOAT X EVOL AirShox, Pair - 2004-2010 Ski-Doo MXZ REV / Summit REV / Summit XP

SKU: 850-21-007
Price: $1495.00

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Fox Racing Shox Front Float X EVOL Airshox Shock Kit - 850-21-007

Fits 2004-2010 Ski-Doo MXZ REV, Summit REV, and Summit XP models (possibly later years and models as well)

17" Eye to Eye, 5" Travel

With the first-ever double backflip on a snowmobile, virtually every top snocross racer using them, and practically every snocross race on the calendar in its win column, the FLOAT® X EVOL™ has definitely earned some bragging rights. With adjustments like DSC, rebound, air spring, and EVOL and main air chambers independently controlling ride height, roll control, and bottom-out, the FLOAT X EVOL can take anything and everything you can throw at it. Start doing some bragging of your own.



  • Front

Sled Type

  • Race, Trail and Mountain


  • Air


  • 4.6 lbs @ 19.5"


  • Dual Speed Compression (DSC)
  • Wide range rebound
  • Infinitely adjustable dual air spring
    • MAIN Air Chamber (Ride height)
    • EVOL Air Chamber (Bottom-out)


  • Infinitely adjustable, progressive, dual-stage spring rate
  • Ultra-lightweight
  • 6061-T6 aluminum piggyback body caps, bodies, air sleeves, and reservoirs
  • Chrome silicon negative spring
  • Teflon-lined spherical bearings
EVOL Air Chamber

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.


DSC (Dual Speed Compression)

With DSC, you can adjust the shock's high and low-speed compression damping by simply turning the external adjusters.

Rebound Damping

Rebound Damping

The rebound knob allows you to tune the damping rate on the extension stroke in order to optimize control in all conditions.

Infinitely Adjustable Main Air Spring

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.

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⚠WARNING: Cancer and Reproductive Harm — Speedwerx, Inc. Prop65 Warnings or

These items are intended for closed-course competition only. Alternation of emissions-related components can constitute violation of federal and/or state laws. Substantial fines and penalties can result if used for other than closed-course competition use.