"Next-generation carbon ceramic, motorsport-derived CCM-R brakes"

"The braking system is the most advanced ever fitted to a McLaren road car, the next-generation carbon ceramic CCM-R brakes utilizing racing technology. Each disc measures 390mm x 34mm and takes seven months to create – seven times longer than a conventional carbon ceramic disc – with cooling vanes machined into the disc, rather than molded. The discs have four times the thermal conductivity and are 60 percent stronger than conventional carbon ceramic discs. This allows the discs to be smaller, reducing unsprung mass, yet over a typical track cycle the temperature of most braking events is 150°C cooler despite the increased performance of the McLaren Senna. Brake fade and wear rates are also reduced. A reduction in temperature serves to further reduce weight (and improve packaging) as the brake ducts can be reduced in size and still meet cooling requirements.