Czinger debuts additive brake system on 21C Spyder

A brake assembly arrived at Czinger’s Area 21 facility in Los Angeles with three jobs folded into one: caliper, suspension upright and hydraulic fluid passages. Called BrakeNode, the topology-optimized structure debuted on the 21C Spyder, the third variant of Czinger’s 21C hypercar platform.

The company says the part delivers a 30% gain in both unsprung mass reduction and stiffness compared with a conventional brake structure. It also claims that stopping distance has been cut by as much as 15%. The architecture relies on hollow, load-bearing sections that make up as much as 37% of the part’s material, while internal channels carry brake fluid through the component and remove the exposed lines found in a typical setup.

BrakeNode is additively manufactured from Z301, an aluminum alloy developed in-house by Czinger. The company pressure-tested it to 500 bar — about eight times what the brake system sees in normal driving. Front calipers use titanium pistons carried over from Formula 1 applications; Czinger says they kept brake fluid roughly 15% cooler than stainless-steel pistons would. Aluminum pistons are used at the rear to save weight.

The brake assembly clamps carbon-ceramic rotors measuring 16.1 inches (410 millimeters) at the front and 15.3in (390mm) at the rear. That hardware comes standard on the 21C Spyder and is offered as a retrofit for existing 21C HDF and VMax owners. The wider car uses additive manufacturing elsewhere too: Czinger says 23% of the 21C Spyder was produced with processes developed by sister company Divergent Technologies, including a MegaNode that integrates front-end components and saves 25% of their weight compared with individual construction.

So what changes in practice? For a small group of hypercar owners, the claimed gains target the hardware between driver input and the road: less unsprung mass, greater stiffness and shorter stops, with the brake package already available on the 21C Spyder and as a retrofit for two existing 21C variants. For everyone else, the significance is narrower but concrete: Czinger is putting an additively manufactured brake structure into a production car, albeit one priced from $2.75 million and limited to 30 units. The performance figures are Czinger’s claims.