Front air suspension for 9m travling bus, adopting overseas advanced technology, some key parts or conponentsare imported ones, like air bag, leveling valve, shock absorber, etc. Used together with rear air suspension DW90RA.Specifications are as follows: Type: Front air suspension for 9m bus Model: DW45FA Distance between the centers of the leaf-springs: 860mm Rated Load: 3000-4500kg Air bellow installation height: 260mm Axle dynamic stroke: 200mm (up 100, lower 100) Distance between the air bellows:1138mm System frequency: 1.1--1.3 Hz