Bigfoot is a giant tire and engine with a pickup truck boom American tuning the pickup truck at the end of 70s the tire manufacturer Bob Chandler just unfolding, created a monster truck prototype, then heard that the U.S. want to buy a car to fight, is the front axle fracture can switch the power to the rear axle, so he came up with 4X4 four wheel drive concept, produced by Bob Chandler in 1979, his design concept called "Bigfoot" pickup.