... trailer fiftting located in Liangshan,Shandong province. Inboard drum axle seriesDarong Inboard Drum Axle Series Axle Type Max.capacity(kg) ... in the Asian market as well as semi-trailer BPW/American axle assembly,axle tube, the single point suspension , ... RSC brand, including axle, BPW/American axle assembly, the single point suspension systems, outboard/inboard drum axle assembly ,spoke axle assembly ...