Triangle Suspension Systems manufactures and markets flat leaf and air springs, threaded rods, U-bolts, suspensions and brake parts for the automotive, truck and trailer aftermarket and the trailer original equipment market. Product lines include Triangle Air Springs, Flagg Suspension Parts, Leland Brake and Wheel Parts, TWR Spring Brakes and Triangle. Triangle Suspension Systems is a subsidiary of The Marmon Group and operates in its highway technologies division. Based in DuBois, Pa., the company has additional operations in California, Oklahoma and Tennessee. Combined, Triangle Suspension Systems has hundreds of employees and more than 270,000 square feet of operations. Its parent, The Marmon Group, is an international association of more than 100 companies that operate independently within diverse business sectors. Based in Chicago, Marmon provides consulting and administrative services, including tax and accounting services, legal counsel and management consulting, to its member companies.