Budd–Michelin rubber-tired rail cars which featured innovative and distinctive pneumatic tires. The company claimed that its application of tires on its rail cars afforded both a substantially more cushioned ride and increased the cars' traction by 35%. The design of Michelin's tired wheels included an aluminum safety ring and a flange that were only used in the event of a puncture or other type of tire failure; during normal operation, only the rubber tire made contact with the rail. Inspired by Michelin's success, the Budd Company set its sights on marrying the new rubber rail tires with its shot-welded, stainless-steel carbodies; it had developed
International Rubber Regulation Agreement „Reichsverband der deutschen Kautschukindustrie”. Other countries, e.g. Japan or the Sowjetunion, had got no representation. The United States tried to become independent of the rubber cartel: establishing rubber plantations in territories under its control; conducting research into rubber-producing plants that thrive in the United States' climate; and reinvigorated efforts to replace natural rubber in tires with a synthetic. In the Fordlandia venture, Henry Ford failed in an attempt to produce rubber in Brazil. The Goodyear Tire and Rubber Company developed plantations in the Philippines and Costa Rica and Harvey Firestone developed plantations in Liberia. Research into synthetic rubber was limited