Recently, Sailun Group became the winner of China Shenhua International Engineering Co., Ltd. "MT5500 Mining Truck 59/80R63 Tire Development and Application" project, which is currently the world's largest grade tire. 　　It is understood that " MT5500 Mining Truck 59/80R63 Tire Development and Application " is a scientific and technological innovation project of the National Energy Group. The project is undertaken by Sailun Group and jointly invested by the United Nations energy group Shenhua Zhugeer Energy Co., Ltd.. After successful tire development, it will give priority to supplying Shenhua Group. 　　The MT5500 mining truck is currently the most loaded mining truck in the world. The vehicle has a weight of more than 200 tons and a total weight of about 550 tons. The heavy load is particularly demanding on the tires, not only in cutting resistance, but also in strong resistance. It has high technical standards for wear resistance and impact resistance, and it has higher requirements for formulas in terms of heat dissipation, thorn resistance and high TKPH.