## Namura NA-50100R Piston Rings 57.38mm - Reliability and Performance for Your Engine The Namura NA-50100R piston rings, with a diameter of 57.38mm, are a crucial component for ensuring optimal performance, efficiency, and longevity of your engine. Often overlooked, piston rings play a vital role in sealing the combustion chamber and controlling oil consumption. Namura, a renowned manufacturer of motorcycle and scooter parts, delivers top-quality products, and these rings are no exception. ### Advanced Materials and Technologies Namura NA-50100R are designed for specific applications, taking into account the type of cylinder liner, its coating, engine size, and engine type (2- or 4-stroke). This precise matching guarantees ideal operating conditions and maximum lifespan. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, the compression rings feature 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 ring set consists of three components: two scraper rings made of highly ductile cast iron or stainless steel, coated with chrome, nitride, or phosphate, and one expander ring made of stainless steel. This design ensures efficient scraping of excess oil and prevents it from entering the combustion chamber, contributing to cleaner engine operation and reduced oil consumption. By choosing Namura NA-50100R piston rings, you invest in quality, reliability, and long life for your engine.