Another different sort of disc brake was Audi's UFO setup. Essentially it was to maximize rotor surface area under 15" rims: https://www.fcpeuro.com/blog/reinv

Another different sort of disc brake was Audi's UFO setup. Essentially it was to maximize rotor surface area under 15" rims: https://www.fcpeuro.com/blog/reinventing-the-rotor-audis-ufo-brake-solution https://www.fcpeuro.com/blog/reinventing-the-rotor-audis-ufo...