Stability like an SUV. The revisited Pivot Post technology works like a stabilizing suspension system providing extra control and protection when running on rough terrain. Lighter than ever. A revisited sole and a more streamlined design remove weight and improve flexibility to help you move more naturally on rough and mixed terrain. TrailTack. The TrailTack rubber sole gives extra traction on both wet and dry surfaces and urges you to go faster, lighter and beyond your limits.