## Namura NA-50015-2R Piston Rings 39.48mm - Reliability and Performance for Your Engine Namura NA-50015-2R piston rings, with a diameter of 39.48mm, are a key element in ensuring optimal engine operation, efficiency, and longevity. Often overlooked, piston rings play a fundamental role in maintaining combustion chamber sealing and proper lubrication. Namura, a renowned manufacturer of motorcycle and scooter parts, delivers a top-quality product designed to meet the specific requirements of its application. ### Advanced Materials and Technologies Namura utilizes carefully selected materials and advanced technologies to ensure maximum durability and effectiveness of its piston rings. The type of cylinder sleeve, its coating, engine size, and piston stroke (2 or 4 stroke) all influence the selection of the optimal material composition. ### Compression Rings The compression rings, made of highly ductile cast iron or stainless steel alloy, are characterized by excellent wear resistance and provide a tight seal for the combustion chamber. Additional chrome, phosphate, or nitride coatings enhance their durability and corrosion resistance. ### Oil Rings The oil rings consist of three components: two scraper rings made of highly ductile cast iron or stainless steel alloy, and a single expander ring made of stainless steel. Chrome, nitride, or phosphate coatings on the scraper rings ensure efficient removal of excess oil, preventing it from entering the combustion chamber. By choosing Namura NA-50015-2R piston rings, you are investing in the reliability and longevity of your engine.