That's possible thanks to some exotic metals, including magnesium wheels - these alone are responsible for a 12 kg reduction over the standard alloy items. (evo.co.uk)
The other economy driver is a 480 kg reduction in kerb weight compared with the outgoing model. (autocarpro.in)
The lightweight wheels combined with the upgraded brakes contribute to a 3.2 kg reduction of unsprung masses compared to the standard 19 - inch wheel, improving steering behavior and driving dynamics. (drivemag.com)