Brake System Components Appraisal

Motorcycle Brake Rotors

The image displays two motorcycle brake rotors, likely made from a metallic alloy such as stainless steel or cast iron, given their typical application and appearance. Both rotors feature a central hub area designed for attachment to a wheel, indicated by multiple bolt holes arranged in a circular pattern around a larger central bore. The surface is polished metal with visible concentric machining marks, indicative of their manufacturing process. Both rotors exhibit various perforations and slots which are characteristic designs to aid in heat dissipation, reduce weight, and prevent brake fade. The rotor on the left has elongated slots and circular holes distributed across its surface, while the rotor on the right features a more intricate, 'swirl' or 'wave' pattern of slots along with circular holes. This difference in design suggests they might be from different manufacturers or designed for different performance characteristics, or perhaps even a front and rear setup. The general condition appears used, with some surface wear, minor rust on the edges and in the bore, and possibly some heat discoloration, which is typical for used brake components. No specific manufacturer's marks or part numbers are discernible from the image. Esthetically, they appear to be standard, functional components rather than highly decorative items. The exact size is not provided, but they appear to be of a common motorcycle rotor diameter, likely in the range of 10-12 inches (250-300mm). The craftsmanship appears to be industrial standard, with no obvious flaws or signs of poor manufacturing.