The Eagle 90 Transmission derailleur is the definitive answer to how good a cable-actuated derailleur can be. It features an all-new T-Type cable actuation ratio to provide the most precise and crisp shifts every time. Utilizing the same Full Mount design as its electronic siblings, Eagle 90 is the strongest mechanical derailleur SRAM has ever produced. Not only is it robust, but the derailleur body features replaceable outer and inner parallelogram links, skid plates, and a tool-free threaded cage assembly, making it the most rebuildable derailleur in the Eagle Transmission Ecosystem. Eagle 90 T-Type Rear Derailleur Features Revolutionary Hangerless interface and Full Mount attachment method creates a far stronger connection because it grips both sides of the frame (Requires frame with UDH interface) Robust T-Type compatible mechanical rear derailleur Featuring no limit screws, no b-tension, and no guesswork Strong and lightweight cage adds durability Most rebuildable derailleur in the SRAM Eagle Ecosystem Replaceable skid plates, outer and inner parallelogram link, cage or cage assembly (sold separately) Specs: Rear Speeds: 12-Speed Cable Pull Ratio: T-Type Actuation Max Tooth: 52t Cage Material: Aluminum Drive Config: 1x Shift Technology: T-Type Actuation Chain Technology: T-Type Weight: 395 Grams Compatibility: SRAM's Eagle 90 Transmission Rear Derailleur is compatible with all T-Type Transmission components. Eagle 90 is compatible with any frame that fulfills the “UDH Specification” featuring a hanger-less interface can be upgraded. The SRAM UDH Bike Finder lists all UDH bikes that are compatible with Eagle 90.