Michelin North America operates 18 plants in 16 locations and employs 22,270 people. It manufactures and sells tires for airplanes, automobiles, farm equipment, heavy duty trucks, motorcycles, bicycles and the space shuttle. Two plants specialize in the manufacturing of semi-finished goods taking raw materials and turning them into components for the plants that produce tires, and one plant strictly produces synthetic rubber. Finished goods are produced in sixteen plants. Two sites produce retreads for trucking and one site produces retreads for the aircraft industry.