Vigo Engineering digs Coal

Coal Mine Haul Trucks are the life blood of a coal mine, hauling overburden dirt and coal to their destinations. Typically 250 to 450 tons gross weight, these nearly 1 million pound trucks require enormous tires just to carry the weight, ranging from 10 feet to 14 feet in diameter. A typical mold just to press a rubber tire this large weighs 50 tons by itself. "Vigo Engineering digs Coal."