The X01 Eagle Rear Derailleur elevates shifting with 's Eagle Ecosystem to expand capability. The rear derailleur has an updated cage architecture to provide better chain management than ever. The X01 Eagle rear derailleur works with the new 10-52t cassettes and is backwards compatible to also work with 10-50t options. X01 is specific for 1x drivetrains to smooth simple best in class shifting across the entire cassette with X-Actuation. X-Horizon is a straight parallelogram design by that limits all movement to the horizontal axis this makes ghost shifting nearly impossible while also reducing shift force. It's buttery smooth quicker and more precise as the large upper pulley offset design maintains a consistent chain across all gears. Upgrade that drivetrain for a seamless shifting experience with the X01 Eagle Rear Derailleur.