Designed to have a smooth radius, with no sharp edges which yield a significant reduction in noise, friction and wear on chainrings and cassettes. The overall design offers ultra-smooth, precise, durable and quiet performance. Key Features: - Groundbreaking new chain design and technology - The Eagle chain has been completely re-engineered and is produced with new manufacturing technology - All-new Eagle PowerLock® chain connector with FLOWLINK technology provides better chain-guiding and increased longevity - The XX1 Eagle chain is the quietest, strongest and most wear-resistant chain in the world - Unique features and design also provide significantly improved - Unique features and design also provide significantly improved wear resistance on Eagle cassettes and rings