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Ferrari 248 F1 - wheel rim lip 23 April 2006

Since its introduction in Bahrain, the protruding outer lip (in red) on Ferrari's wheel rims has been the subject of much discussion, with rivals questioning whether it constitutes an illegal moveable aerodynamic device - the movement being the wheel's rotation. Ferrari say the lip is a functional part of the air intake system for brake cooling and that its profile remains the same, regardless of whether the wheel is moving - hence it is not effectively 'moveable'. Ferrari's brake cooling system has two main parts - an inner drum (in yellow) where cool air (blue arrows) enters, and an outer part where heat from the brakes (red arrows) is expelled.