Dellner Brakes AB has acquired JHS Jungblut GmbH and Pintsch Bubenzer GmbH and with this purchase, the collection of products has become very large and diverse. It is unreasonable and unsustainable for the company to retain all existing products; to uphold a sustainable collection of products it must rationalize to avoid internal cannibalization between products. The purpose and aim of this work is to analyze the products from a technical perspective. From this a rationalized collection of products based on a technical analysis can be presented. The rationalization is done from a customer perspective and is limited to the disc brakes product field due to the similarity in product collections in the companies which have been purchased. The quantitative and qualitative data collection has been performed through gathering relevant information from public company sources and internal company documents. This together with a qualitative interview method, using relevant personnel in a structured way, the empirical data was gathered. By utilizing theories of product design and development and implementing these on already existing products, a concrete comparison was done on the chosen specifications of relevance, on the disc brakes. Theories such as quality function deployment, concept screening and scoring and design for assembly were used as analysis tools. Analysis of the empirical data was done from an engineering perspective with the given framework of technical analysis and the limitation to disc brakes. The quantity of individual brake models quickly became very large. To tackle this difficulty, the individual disc brakes were divided into groups, based design and model type. The result of the technical analysis shows three different product groups after the technical analysis comparisons in relation to the references from a customer perspective and based on the theoretical methods chosen.