The MRP Wave Oval Ring Cinch Direct Mount goes beyond the narrow-wide design of the competition with its innovative Wave tooth pattern, which offers optimal chain retention while shedding excess mud and debris in nasty conditions. Another bonus, it reduces overall friction for greater longevity. This particular version is oval-shaped, which helps to reduce the "dead spot" in each pedal stroke for increased pedaling efficiency. It pairs with the Race Face Cinch system, making it all the more future-proof with its modular, direct-mount design. It's available in a wide variety of sizes for customizing your gearing to the local trail and terrain at hand.