The pneumatic spring systems of SMV S6 = triple bellows with diameter of 6 inch and S8 = double bellows with diameter of 8 inch can be supplied for many actual models incl.charging certificate. You enjoy comfort in your holidays, you drive at the limit of vehicle payload, then you need a pneumatic spring. After installation of the pneumatic spring the travelling comfort and the security of driving increases and if necessary you can payload your vehicle. The 8 inch version offers an advanced travelling comfort - due to the larger diameter the weight will be allocated more equally and for example, it absorbs the roughness of the ground. In general the SMV of systems are supplied as 2 ways systems,so you can, if necessary, vary the operating pressure on the right and on the left. Partially certificated by Technical Control.