The newest version of FOX's renowned lightweight shocks and springs to fit deep snow sleds. They feature QS3 three position adjustment for quick, easy compression and rebound adjustments and fit S-36 front suspensions. FEATURES: Optimized lightweight spring & shock design. FOX ice scraper technology (FIST). One-piece, aluminum mounting hardware. High-flow velocity-sensitive damping. Internal groove position sensitive technology. Fully rebuildable and re-tuneable. Ski stance: 36''. - REV Gen5, REV Gen4 Summit & Freeride