The larger, 14-tooth X-SYNC™ lower pulley allows 10- to 50-tooth cassette, & also adds to Eagle’s overall smooth-pedaling feel. Our new, Type-3 ROLLER BEARING CLUTCH™ features a smoother torque curve for a quieter, more consistent operation & feel. CAGE LOCK™ has been moved back & out of the way, protecting it from trail debris. & a redesigned, robust mounting system further improves the Eagle™ derailleur’s performance & overall durability. -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 -Completely redesigned rear derailleur incorporating our proven X-HORIZON™ design & new Type-3 ROLLER -BEARING CLUTCH™ technology -Re-engineered mounting system & repositioned CAGE LOCK™ add robustness -Eagle™ pulley technology provides greater efficiency, crisper shifting & quieter operation