SRAM S500 Eagle AXS 12sp Rear Derailleur. Features: AXS enabled componentry software makes it possible to both program and personalize SRAM and RockShox components with Eagle technology Utilizes Type 3 cage damper for confident chain retention and quiet descending Robust aluminum cage Compatible with Eagle drivetrain 50T or 52T cassettes Overload Clutch protects against impacts Battery sold separately Specs: Model: S500 AXS Mount: 10x1 Standard Speed: 12 Cage: Long Retention: Clutch Min Max: 10/52t Capacity: 42t Weight: - Color: Black