Chaparral 2J in 1970, that provided enormous downforce and greatly increased cornering speeds. The aerodynamic forces pressing the cars to the track were up to five times the car's weight. As a result, extremely stiff springs were needed to maintain a constant ride height, leaving the suspension virtually solid. This meant that the drivers depended entirely on the tyres for any small amount of cushioning of the car and driver from irregularities in the road surface.

Big business