The effect of airflow underneath the nose had first become apparent in the early 1990s. By the end of the decade, most teams had settled for a design where both lower front suspension arms were mounted from a single longitudinal "keel" running underneath the nose. For 2001, the
FIA introduced a regulation lifting the sides of the front wing by 50mm, in order to reduce
downforce and cut cornering speeds. Sauber had introduced separate pylons for each of the front suspension mounts on their previous car, the
C19. For the C20, the area between the front and back mounting points on each side was filled in, creating two longitudinal keels running underneath the sides of the nose.
Sergio Rinland designed the car, and then promptly left the team to join
Arrows, leaving the C20's development in the hands of
Willy Rampf. Despite operating on a relatively modest budget, weight saving was a major consideration in the design of the car, and the team spent 35 weeks perfecting the aerodynamic package in the wind tunnel during the design phase. ==Drivers==