The air suspension SMV S6 = triple bellows 6 inch in diameter and S8 = double bellows 8 inch in diameter are supplied inclusive charging certificate for many actual models. If you like comort at your vacation, and you are at the limit of your vehicle's payload , then you need an air suspension. By installing the pneumatic spring the travelling comfort , the driving safety increases, and if needed, raising the limit of vehicle load is possible. The 8 inch version provides an additional travelling comfort - due to its larger diameter the weight relocates more steadily and smoothes for example the bumpiness of the ground. The SMV of systems in general supplied as 2 ways systems, then you can vary, if necessary, the operating pressure on the right and on the left. Partial expert's report by Technical Control.