The first Ferris wheel from Chance, the Astro Wheel, was sold to showman Don Franklin and debuted at the 1967 Iowa State Fair. It featured 16 cars with two passengers per car. The first park model, an 80-foot Giant Wheel, was built in 1975 at Valleyfair amusement park in Minnesota. It features 18 cars holding four passengers per car and is still in operation. The Giant Wheel/Century Wheel was introduced in various sizes in both park and portable models in 1988.