Leadfoot is one of the Wreckers, a group of former engineers turned fighters who have turned their talents to kicking Decepticon tail across the galaxy. His specialty is building bigger and better weapons, WITH SCIENCE! Unsurprisingly, this vocation has led him to strike up a friendship with the Autobots' resident weapons-hound Ironhide. The way the two egg each other on towards bigger and better "boom-sticks", the other Autobots fear one day waking up to find a smoking crater where their workshop once stood.
His alt-mode is a Juan Pablo Montoya NASCAR #42 Target.