The wheel's reduced mass equates to a decrease in unsprung weight, i.e. everything carried ‘outboard;’ suspension, brakes, hubs and wheels. Reducing unsprung weight is one of the best ways of bringing about real improvements in handling. ATS wheels can result in an overall weight reduction of up to 16kg per vehicle, ensuring sharpened handling and, as an added bonus, a reduction in emissions.
ATS manage these remarkable reductions in weight via a unique construction process known as flowforming. The process sees key areas of the blank cast alloy rims rolled out and compressed, which significantly reduces the amount of cutting or machining required, and in most cases eliminates it completely. Not only does this save time and resources, it enables the walls of wheels like the Racelight to be significantly thinner, reducing the overall mass of the wheel without compromising strength of stability.
Flowforming is used in conjunction with another automotive industry manufacturing technique, forging. Now ATS is far from alone in employing a forging process to create its alloy offerings, but it is one of the most adept. Forging allows for a higher density of light alloy and therefore greatly increases strength, while also enabling thinner material to be used, again without any loss of stability. Flowforming and forging mean that none of this comes at the expense of overall strength, hence why ATS wheels are such a common site in FIA accredited motorsport series, and also why the Racelight manages to be as tough as it is light."