Helper and reinforced springs are suspension systems that support or reinforce the existing suspension system in order to correct a suspension problem. Helper springs are fitted on vehicles with leaf suspension. A helper spring or replacement spring is used on vehicles that already have coil spring suspension. These reinforced springs will largely ensure that the vehicle returns to its original ride height, which increases spring travel and thus improves stability and, to some extent, comfort levels.
A VB-CoilSpring is the right option for vehicles that are always heavily laden and that do not carry variable loads. This is because the reinforcement to the spring force is permanent and cannot be adjusted.