December 8, 2006 The latest development from the Kahn laboratories is this Carbon fibre RS-X wheel made up from a carbon fibre rim with a magnesium centre. Kahn Design is now manufacturing these wheels for super high performance vehicles – necessary because unless you own a supercar, you probably won’t be prepared to pay the asking price for a wheel that weighs just 6 kilograms. The understandably huge reduction in radial inertia and unsprung weight offered by the wheels offers substantial improvements in performance and handling. Each set of wheels is custom made to order for each vehicle.