Tires designed specifically for combines are also in the works. For 2011 Firestone says it will introduce what will be considered the next-generation combine tire — an RCI 49 900/75R32 (36 in. wide and 85 in. tall) — able to carry the weight of Class 9 and Class 10 combines. “These new larger-capacity machines with larger grain tanks, wider corn and soybean heads, as well as larger Tier 4 engines will push the limits of the industry’s current tire offering,” says Bridgestone-Firestone’s Rodgers. “The 900/75R32 will operate at lower pressures, for the same load, than any other single drive tire on the market today.”