Shandong UT Trailer Parts Co., Ltd. Make full ranges of spare parts for semi-trailers: A. Mechanical suspension: Casting or welded type. American ... as BPW, SAF, FUWA, YTE, ROR, MERITOR B. Cantilever suspension (bogie), 24, 28, 32 tons capacity. Design can be same ... fabricated from one steel tube without welding E. Air suspension system, most parts imported from Germany. F. Landing gear: Single side ...