If you thought crispy shifting was only for the electronic crowd, think again. The SRAM Eagle 90 12-Speed Rear Derailleur brings cable actuated Transmission shifting to the masses with the same powerful Full Mount design as its electronic bretheren. With tough materials and a ton of replaceable parts (this is the most rebuildable derailleur in the Transmission ecosystem) you can count on this thing to deliver the goods for years to come.