The aluminium or steel hub, instead of a cast iron one, allows the weight of the brake disc to be reduced by about 15% - 30%.
Compared with the vehicle weight this reduction could seem marginal. However, it has a very important impact on fuel consumption, performance and car behaviour, since the disc is part of the vehicle's unsprung weight.
Compared with the vehicle weight this reduction could seem marginal. However, it has a very important impact on fuel consumption, performance and car behaviour, since the disc is part of the vehicle's unsprung weight.
In recent years, reducing vehicle weight and unsprung weight has been one of the major objectives of car manufacturers to tackle the need for greater reductions in fuel consumption and emission levels.