Liangshan Darong Traffic Machinery Co., Ltd. is a professional manufacturer of semi-trailer fittings located in Liangshan, Shandong Province. We utilize the latest technology to ensure the cost efficiency for our customers. We specialize in the supply of special spare parts for semi-trailers in Asian market as well as semi-trailer BPW/American axle assemblies, axle tubes, single point suspensions, tandem pendel axle series, spoke axle series, and outboard/inboard drum axle series for international markets. We are developing and expanding gradually, and all our products sell well at home and abroad based on 10 years of research and manufacture experience in the field. With many years of research and development experience, our factory has accumulated vast knowledge in the industry's technological aspects. We have 30 specific products among 6 major varieties of our RSC brand, including axles, BPW/American axle assemblies, single point suspension systems, outboard/inboard drum axle assemblies, spoke axle assemblies and other special car accessories. Our technology and quality adheres to national standards, and we are one of the leaders in the field. We have attained ISO9001 international quality system certification. Our advanced manufacturing methods, comprehensive testing system, strict quality standards and excellent after-sales service have enabled us to become a respected firm. We adhere to the policy of "quality first, customer foremost", and we strive to provide complete service for our customers. We welcome old and new customers to visit our company and discuss business with us.