The 360 Spider is Ferrari's twentieth road-going convertible. The model was regarded a classic even when launched in 2000. Designer Pininfarinas lines are by many regarded as timelessly beautiful and yet sportingly aggressive. The engineers worked hard from the start of the 360 project to lay the foundation for a Spider with exceptional torsional and flexional rigidity. They had to strengthen the sills, stiffen the front of the floorpan and redesign the windscreen frame. The rear bulkhead had to be stiffened to cut out engine noise from the cabin. The convertible's necessary dynamic rigidity is provided by additional side reinforcements and a cross brace in front of the engine. Passenger safety is ensured by a strengthened windscreen frame and roll bars. The 360 Spider displays a curvilinear waistline. The fairings imply the start of a roof, and stable roll bars are embedded in these elevations. Due to use of light aluminium constructions throughout, the Spider weighs in with only 60 kg (130 lb) more than the coupé. With its hood up, the Ferrari 360 Spider looks extremely aggressive. Lowering the hood totally transforms the look. Seen from the side, the 360 Spider resembles a sports racer, a sensation underlined by the length of the rear engine bay, the twin roll bars, the rear fairings and the steep windscreen.