Share this on: Bosch compound brake discs Range extension New product innovation in lightweight design Find your Bosch brake disc What is a Compound brake disc? The compound brake disc is a new product innovation in lightweight design, comprised of a profiled steel or aluminium hat, combined with a high-carbon cast iron friction ring. The two components are held together by stainless steel rivets. Compound brake discs feature various materials, binding methods and designs, depending on the vehicle model. All Bosch compound brake discs are ECE R90 certified. Their material composition and tolerances are optimally adapted to the brake system of the designated applications. Example of a compound brake disc for Mercedes-Benz models Newly developed compound discs for Mercedes-Benz models Example of a compound brake disc Mercedes-Benz models in the current design (left) and new design (right) The design is based on the respective original equipment brake disc and the newly developed packaging protects both the brake disc and the anti-corrosion coating. The handling instruction ensures correct handling and installation. Advantages over standard cast iron brake discs Lower fuel consumption & emission Lightweight component design results in lower fuel consumption and reduced CO2 emission. Improved driving comfort Reduced unsprung mass improves driving comfort and performance. Reduced brake judder Enhanced thermal capacity and heat conductivity reduces brake judder. Another advantage is that the friction ring is highly resistant to thermo-mechanical stresses. Reduced warping and noise The friction ring and rotor hat are joined using a special method which further reduces undesired heat flow. This reduces warping and hot tears, as well as vibration and noise. The complete Bosch range of compound discs covers applications for both Mercedes-Benz and BMW Total of >12 million vehicles covered in EU today Ready for the growing compound discs trend in the worldwide IAM car park Handling instructionscan be found here Further topics Product catalogue Auto parts and accessoriesLearn more Services & Support Technical servicesLearn more Service Training & Training SolutionsLearn more