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About us

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    Double Stone Group was found in 1995, located in Bocheng Industrial Park,Gaomi,Weifang,Shandong,China,nearly Qingdao port. Subsidiaries Shandong Double Stone Tyre Co.,Ltd. Shandong Longrun Wheels Co.Ltd. Shandong LongshanTyre Co., Ltd.  Shandong Double Stone Chemical Co.,Ltd. Shandong Double Stone Equipment Tech Co.,Ltd.The stable development makes it become one of the top 10 factory  in Shandong province.
    Factory total area is 150,000 square meters with employee 1050.Quality management system is ISO9001.Not only produce Tires for Agricultural, Industrial, OTR , Truck, Trailer, Motorcycle but also Wheels ,Outdoor power equipment ,Machinery equipement and Prefab house ,with annual output of  50,000,000pcs, output production value RMB 340 million, total assets RMB560 million. Brands are DOUBLE STONE LONGSHAN and LONGRUN.DOUBLE STONE is for International market and LONGSHAN LONGRUN are for domestic market.
Our quality products pass all the regular testing. They are certified by U.S.A.DOT, CCC, REACH, E-mark and meet with ISO standards. We have the first level producing equipment and test facilities in the industry. The raw materials go through the most strictly test. All these combined with our experience engineer ensure the consistent top quality of our products. Besides products quality control, R&D has been among our top priority, with a good ability on OEM. New designs and models have been continuously created.
Over the years efforts, our high honesty, stable quality control and good services have helped us built reliable partnerships with our Thailand material suppliers, domestic and foreign customers. Foreign markets are in North America, South America, Europe, Australia, and Asia more than 20 countries and regions, nearly 80 customers. The domestic market percent is 60% and foreign market 40% of Sales value.   
    In the increasingly competitive tire market, Double stone will continue our tradition of focusing on innovation, quality and services.