The XX SL Eagle Transmission radically changes the relationship between cassette and derailleur. Designed as integrated, interdependent drivetrain components, the T-Type derailleur mounts around the wheel's own axle.
Hangerless interface, no derailleur hanger, Full Mount mounting method.
The tension pulley, called the Magic Wheel, continues to roll even if any object (sticks, branches) gets caught.
Protection system: Overload Clutch (allows the change to detect the impact and protect itself against possible damage).