2011 rule changes - aero rims 03 February 2011
Rotating wheel discs, or 'wheel-spinners', were banned last year, but teams such as Ferrari effectively circumvented this by casting aero features into the wheel rim itself in a bid to optimise airflow passing through the wheel. There will be far less scope for such concepts in 2011, thanks to tighter restrictions on spoke surface area.
FIA Technical Regulation
12.4.6 - When viewed perpendicular to the plane formed by the outer face of the wheel and between the diameters of 120mm and 270mm the wheel may have an area of no greater than 24,000mm².
