There was a time when tractors used steel wheels, so they were limited to traveling at low speed through the countryside and were unusable on roads and highways. Goodyear Tire & Rubber Company put itself at the forefront of a new movement. While with some misgivings, the owners of tractors began to adopt rubber tires at the beginning of the 1930s. By 1938, almost all new tractors manufactured in the United States had rubber tires. The industry never backed down.