Reference Surfaces

In Simple Terms

Reference Surfaces are the official boundaries and measurements that define a car's shape and dimensions. The FIA uses these imaginary surfaces to check if a car's body parts (like the nose, floor, engine cover, and side walls) stay within the legal limits. If a car's parts stick out beyond these reference surfaces, it fails technical inspection.

• Reference Surfaces are invisible measurement boundaries that define the legal shape of an F1 car
• They cover major components including the nose, floor, engine cover, sidewalls, and other body parts
• The surfaces form closed polygons based on specific measurement points, and the car must fit within these limits
• Violations result in the car being deemed illegal and subject to penalties