How do I install SRAM Eagle AXS Transmission? The Eagle Transmission has a revolutionarily new and simple installation process. Please refer to the manual, AXS App Setup Guide, or the installation video below for information on installing your new Eagle AXS Transmission. Related articles How do I know which “Setup Key” position is needed for my bike when installing SRAM Eagle AXS Transmission? How do I size a chain for a SRAM Eagle AXS™ drivetrain? How do I pair my AXS components together? Can I upgrade my mountain bike to use SRAM Eagle AXS Transmission? How many hours of riding can I get from a fully charged Eagle AXS derailleur battery?