2016 Timbersled Snow Cross SX137, 2016 Timbersled Mountain Horse Snow Cross SX120 The Mountain Horse Snow Cross (SX) kits began life as purpose-built race machines- but they’ve proven to be equally at home in the steep and deep as they have on the trails of the mid-west. The Mountain Horse SX kits are the most responsive and longest travel snow bike kits on the planet. SX kits use a 2” narrower track and tunnel than the ST or LT kits, as well as race specific frame and suspension geometries. For 2016, the SX no longer uses the 3rd shock on its frame. The SX now uses the same fit kits as the ST and LT kits, and can use either the traditional Solid Strut Fit Kit, or the new Timbersled Suspension Strut Fit Kit. This effectively lowers the price of the SX kits, and (using the TSS Fit Kit) provides a whole new level of SX suspension. Features may include: Uses Fixed Strut or New Timbersled Suspension Strut (TSS) Fit Kits Ultra-responsive narrow 10.5” Convex 2.5 track Available in 120” or 137” lengths Full length lightweight mountain tunnel Tunnel top is pre-drilled for gas rack and cargo rails (sold separately) Gas can and rack sold separately Kit includes: Track system, spindle and 10” Backcountry ski Requires a Fit Kit to install (described below) Note: Shown with optional 3.3 gal Gas CanKit includes: Track system, spindle, 10” Backcountry ski. Requires a Fit Kit.