Budd–Michelin rubber-tired rail cars remained obscure in comparison with other competitors for the title, such as the "Pioneer Zephyr" and Union Pacific's M-10000. Rubber-tired rail cars achieved greater success in France, and similar rubber-tired subway cars have been adopted in Canada and Mexico as well as on numerous systems in Europe. During the 1920s, the American Budd Company, at the time a relatively obscure auto-frame supplier, developed an extensive working relationship with the French firm Michelin, which was best known for its tires. In 1929, Michelin built its first rail car, and by 1932 nine of its cars were in operating service, all of
United States Rubber Company became prosperous manufacturing waterproof cloth, rubber footwear and machinery belts. It began to produce auto tires in 1906 in its Montreal factory and through a series of mergers with other companies in Ontario and Quebec became the Canadian Consolidated Rubber Company Limited. After another series of mergers, the company became the Dominion Rubber Company Limited in 1926. It produced footwear under a variety of brand names, coated upholstery fabrics, mechanical parts, industrial chemicals and vehicle tires. In 1966, after four decades as Dominion, the company was renamed Uniroyal Ltd., along with all other company holdings, and in 1981, it was