 | This article needs additional citations for verification. (August 2007) |
A skid block, also known as a plank, is a common term for a mandatory attachment to the underside of a racing car. Initially applied to Formula One cars in 1994, it has also been used in other categories including Formula 3000 and Formula 3. It is a flat rectangle, usually made of fiberglass or a wood composite, designed to impose a minimum ground clearance and to regulate the use of ground effects to enhance handling.