The Sauber team have admitted that they have a flexible rear wing construction during last weekend's race at Melbourne. Technical director Leo Ress said: "I saw something similar on some of the cars last season, so when we designed the new car, the rear wing was deliberately designed to flex a little bit."

The idea uttered by some is that when the rear wing bends down on top speed the amount of downforce is reduced resulting in an increase of top speed, however maintaining this downforce in the corners. According to the regulations the rear wing needs to be rigidly attached to the car but no real measurement standard is set yet. This standard is to be in place in Brazil next month. McLaren boss Ron Dennis stated: "Any movement is not designed to provide us with an aerodynamic advantage, whatever the degree. The wing is designed to stay fixed to the car and therefore you have a degree of flexibility. You design something you believe is optimised for structural integrity. You don't want it overly strong."