SRAM X01 Eagle 12 Speed Rear DerailleurPurposeThe extra range on a large rear cassette is pretty much useless unless there is also a derailleur built to handle it. The Eagle X01 rear derailleur has been newly hatched for just this purpose and represents the newest edition of SRAM's proven, X-Horizon design. A 14-Tooth lower pulley makes the larger capacity possible and contributes to the smooth pedaling feel of the Eagle 12 speed components system. The roller bearing clutch has been reworked into a Type-3 version and provides a smoother torque curve compared to previous renditions in order to providing a more consistent feel and operation. Add in the durability improvements made to the Eagle's mounting system and what we have here is a highly sophisticated bird of prey ready to seek and destroy anything that crossed its flight path.ReviewsBikerumor - "Basically, Eagle is substantially lighter than a 2x, has a 500% range, and makes the bike simpler. In other words, it frees you from ever needing a front derailleur again." - Tyler BenedictVital MTB - "Eagles are going to invade the planet, eat front derailleurs alive, and leave them for dead." - Chris HiltonFeaturesCompletely redesigned rear derailleur incorporating our proven X-HORIZON design and Type-3 ROLLER BEARING CLUTCH technology.Re-engineered mounting system and repositioned CAGE LOCK add robustness.Eagle pulley technology provides greater efficiency, crisper shifting and quieter operationSPECIFICATIONSSpeeds12 SpeedCable Pull RatioX-ActuationMax Tooth50Intended UseTrail, All-MountainWeight1502g Complete Group (Does not include BB) | SRAM X01 Eagle 12 Speed Rear Derailleur Red, 12 Speed, X-Actuation