The Bigfoot 5 monster truck is commonly listed as 15 feet tall.
Built by Bob Chandler in 1986, Bigfoot 5 was designed specifically to use enormous 10-foot tires recovered from a military land train used on the Alaskan tundra. Those tires were far larger than the roughly 66-inch tires common on monster trucks of the era, requiring a specially built chassis and body arrangement.
Some detailed records give its height as approximately 15 feet 5 inches or 15 feet 6 inches. Thus, “15 feet” is the standard rounded answer and fits the quiz’s whole-number choices. Bigfoot 5 is also famous for its extraordinary width and weight: it measures about 20 feet wide and weighs roughly 38,000 pounds.
Because of its immense size, Bigfoot 5 has generally served as an exhibition and display vehicle rather than a regular competition truck. Its debut helped establish it as one of the most recognizable record-setting vehicles in monster-truck history.