Stability like a SUV. The revisited Pivot Post technology works as a stabilizer suspension system providing you with extra control and protection when running on rough terrain. Lighter ever. A revisited sole and a more aerodynamic design take out 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 stimulates you to go faster, lighter and beyond your limits.