A vehicle that has good axle articulation can keep all wheels in contact with the ground while traversing obstacles, which ensures that all wheels can deliver their torque to the surface with less risk of losing traction on any given wheel.
A vehicle can keep all wheels in contact with the ground while traversing obstacles. This vehicle has good axle articulation. All wheels can deliver their torque to the surface with less risk of losing traction on any given wheel. Traversing obstacles ensures this.