Firestone Farm Implement I-1 tires are designed as free rolling tires for trailers and wagons. A shock fortified nylon cord body material offers great impact protection to these trailer tires. Tires vary in sizes and loads. This particular Firestone farm tire has 8 ply toughness rating and load capacity varies, depending on the size of the tire. Farm Implement I-1 has six circumferential treads that allow to whip away water, mud, and snow from the tire to provide better grip. These Firestone trailer tires are erosion resistant and can be used at speeds up to 31 miles per hour. These tires are for agricultural uses and serve a long life for intended settings.