Rearair 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 DW45FB. Specifications are as follows:Type:Rear air suspension for 9m bus Model: DW90RB Structure: 4 link-rods guiding Distance between the centers of the leaf-springs: 984mm Rated Load: 4000-4500kg Air bellow installation height: 260mm Axle dynamic stroke: 200mm (up 100, lower 100) Distance between the air bellows:1450--1456mm Distance between the air bellows(front to rear): 1450mm System frequency: 1.1--1.3 Hz Matched with Meritor axle