"Introducing the Rear Track Shocks - LIGHTWEIGHT 1.5 ZERO QS3-R (Center) / LIGHTWEIGHT 1.5 ZERO QSR with lockout (Rear) from Ski-Doo, designed for the fearless rider who demands performance in deep snow. These state-of-the-art shocks feature FOX's latest lightweight technology, ensuring you glide effortlessly over challenging terrain. With the QS3 three-position adjustment on the center shock and a lockout feature on the rear, you can easily tailor your ride for optimal compression and rebound. The high-flow, velocity-sensitive damping and internal groove position-sensitive technology guarantee a smooth experience, while the fully rebuildable design means these shocks are built to last. Suitable for track lengths of 146"" - 165"", they are ready to tackle any adventure. Trust in Ski-Doo to elevate your ride to the next level. The newest version of FOX's renowned lightweight shocks to fit deep snow rear suspensions.The center shock features QS3 three position adjustment for quick, easy compression and rebound adjustments, the rear features QS3 compression adjustment plus a lockout feature. 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. Fits 146"" - 165"" track lengths."