Each tooth’s thickness is precisely toleranced & controlled to work seamlessly with the chain’s inner & outer links. -Only Eagle is a complete system-engineered drivetrain designed, tested & proven to deliver the lightest, highest- performing, most durable system for all riders on any trail. -Eagle technology provides an expanded, optimum, gear range making you fast on the flats, giving you control on the climbs & unleashing your speed on the descents. -Compatible with all levels of Eagle drivetrain systems