The X-Maxx WideMaxx kit includes extended versions of the extreme heavy-duty suspension arms. Molded from Traxxas' toughest composite material, these arms offer just enough flex to resist breaking, even in cold weather. Five different color options allow maximum customization of your X-Maxx. 1.346 rate shock springs replace the standard springs for optimal handing performance. Wider suspension links and steel driveshafts complete the package.