[Neweller]

The available range of the air suspension system is limited, generally 4-5 inches max. They work in most situations, but occasionally you find yourself on a site that places you out of their range of operation. Another advantage to the air is that you have only one system to maintain.

On the other hand, the electric jacks that I've seen are not adequately rated to handle the weight of a full size coach like a Newell, especially the rear, even though the range of the jacks is greater than that of air springs. The big negative here that I see is having another system to maintain, providing the jacks will handle the weight. To me, hydraulic has the same drawback; just something else to maintain when you can do an adequate job with what the bus was equipped with.