Small sidepod winglets were significantly altered prior to the 2008 French Grand Prix, providing twin turning vanes to better control airflow over the rear of the car. At the Canadian Grand Prix tweaks were also made to the flip-up flaps in front of the rear wheels, to reduce drag. For the Italian Grand Prix, at the low-downforce Monza circuit, Williams tweaked the design of the FW30's bodywork, and front and rear wings. Sporting only a single element, with its outer edges turned upward, the rear wing was designed to reduce drag on Monza's long, fast straights, while still providing sufficient downforce during cornering. Final adjustments were made to the FW30's rear aerodynamics prior to the Brazilian Grand Prix. Here, the small winglets in front of the rear wheels were augmented by the addition of a small flap beneath their main elements, in order to better deflect airflow around the wheels and reduce the aerodynamic disruption caused by the wheels' rotation.