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The PneurideŽ array of semi air suspension systems are supplied by Dunlop Systems and Components. Air springs and bellows have been designed, developed and manufactured by this company for almost more than half a century. During this time moreover than 10 million parts have been sold to a very wide range of truck fabricators.
The PneurideŽ semi air suspension kits have been designed in such a way any fitting will be well within the scope of a confident 'do it yourself' person. The absolute number of pieces has been minimised and no special tools are required.
Semi air suspension systems enable the vehicle ride height to be kept level. They greatly increase stability, in particular during high-speed motorway navigation - in a straight-line, when battered by strong crossing winds and whilst being overtaken by heavy vehicles. At lower speeds they significantly reduce body roll on roundabouts and when cornering.
A rear suspension adapted create a semi air suspension system can be stiffened simply by increasing the air pressure in the bellows. This alleviates any sagging of the rear suspension due to imbalanced or excessive loading.
Many people fit semi air suspension units to make good the rear ride height of a motorhome to its original on the flat. Unlike vans, motorhomes are always fully laden. This is especially true if accessory rear racks are fitted to carry bikes etc. As a consiquence of of persistent full loading, steel springs tend to sag after a while. Semi air suspension systems effectively offset this tendency.
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