Fox Racing Shocks 853-21-019 Factory Race Series Float 3 Evol QS Rear Track Shock Kit

The Fox Racing Shocks Factory Race Series Float 3 Evol QS rear track shock kit represents the pinnacle of lightweight mountain snowmobile suspension technology. Engineered specifically for aggressive backcountry riding, this air-sprung shock package delivers exceptional weight savings without compromising durability or ride quality.

Key Features:

• Float 3 air spring with Evol air chamber for infinite spring adjustment and progressive ramp-up
• Quick Switch (QS) technology with 3-position compression and rebound damping adjustment
• Position-sensitive damping with internal bypass grooves for plush ride zone performance
• Enhanced bottom-out resistance in final 30% of travel for hard hits
• Optimized through material reduction in reservoir walls and mounting hardware
• Lightweight construction reduces outboard weight for improved handling
• Sold as a pair, ready to install

The Factory Race Series Float 3 Evol QS shocks feature Fox's proven position-sensitive damping technology, originally developed for desert truck racing. Spiral grooves inside the shock body allow oil to bypass around the main piston during normal riding, reducing damping force for exceptional comfort. As the shock enters the final third of its travel, these grooves terminate, forcing all oil flow through the main piston to provide significant bottom-out protection. The dual air chamber design combines a main Float air spring with an Evol chamber, creating a highly progressive spring rate that soaks up bumps while preventing harsh bottoming on big hits.

The simple Quick Switch adjustment system lets you dial in compression and rebound settings in seconds without tools, so you can adapt to changing snow conditions on the fly. Whether carving powder or navigating rough trail sections, these shocks deliver the performance serious mountain riders demand.