## Namura NA-50100-4R Piston Rings 58.38mm - Reliability and Performance for Your Engine The Namura NA-50100-4R piston rings with a diameter of 58.38mm are a key component for optimal performance, efficiency, and engine longevity. Often overlooked, piston rings play a fundamental role in the proper functioning of the power unit. Namura, known for its high-quality motorcycle and scooter parts, offers rings designed for specific applications, guaranteeing a perfect fit and reliability. ### Advanced Materials and Technologies The materials used in the production of Namura piston rings are one of the most important factors influencing their performance. The type of cylinder liner, its coating, engine size, and piston stroke (2 or 4 stroke) - all these elements influence the selection of the appropriate material composition to meet the operating environment requirements. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, the compression rings are characterized by excellent wear resistance and provide a tight seal. Chrome, phosphate, and nitride coatings further enhance their durability and corrosion resistance, meeting the demands of even the most challenging applications. ### Oil Control Rings The oil control rings consist of three separate components: two scraper rails made of highly ductile cast iron or stainless steel alloy, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. This design ensures effective scraping of excess oil, preventing it from entering the combustion chamber and minimizing oil consumption. By choosing Namura NA-50100-4R piston rings, you are investing in the quality and longevity of your engine.