Most large trucks have nine tires on each side, with the majority of these tires being recapped—used tires that have replaced tread on them. You have likely seen parts of truck tires on the highway; this occurs when the tread flies off, potentially hitting another vehicle and causing an accident. Tractor-trailers equipped with “super singles” can experience a tire literally blowing apart, leading to a potentially serious accident. Also, since it can take the length of a football field for a large, loaded truck to come to a complete stop, you do not want to be directly in back of the truck when the driver is forced to stop suddenly.