Lamborghini needed specialty wheels made with quick-to-market processes. Alcoa built directional-specific 18 x 9-in. front wheels and 18 x 13-in. wheels forged from one piece of 6061-T6 aluminum for the rear. Each wheel undergoes extensive machining and finishing and is lightweight but strong and durable. All wheels are finish coated in Lamborghini Bright Black and fitted with carbon fiber "winglets" adding to the design of the wheel and complementing the vehicle's overall appearance. The special edition Lamborghini Murcielago Reventon launched at the 2007 IAA Frankfurt Auto Show and was a show stopper at the Tokyo Auto Show in October.