Is a tire brand jointly established by Italian Pirelli Tire Company and Yanzhou Lu Tong Tire Co., Ltd., established in 2006. R&D mainly deals in truck tires, passenger car tires and light truck tires, and the application environment of tires is also obviously different, such as high-end industrial and mining, high-end heavy load, high-end wear resistance, long-distance high speed, medium and long-distance standard load and so on.

It is a domestic brand. Roadster is a Ruite series tire owned by Leiden Tire. Leiden tire is the only brand operated by Shandong Duoluchi Rubber Co., Ltd. The company's main products are: high-performance tires, environmentally friendly tires, SUV tires, off-road tires, commercial light truck tires, winter tires, run-flat tires and so on.

With a total investment of 3 billion yuan, it introduced advanced production equipment and scientific production management concepts from the Netherlands, Germany, Italy, the United States and Japan, and paid attention to quality management and scientific and technological innovation.