NX/GX Eagle Groupset - SRAM NX/GX Eagle Groupset w/ GX Shifter, Derailleur,

SRAM GX Eagle Extended range Rear Derailleur 12 Speed Lunar. This kit has 4 parts to make it simple to upgrade your drivetrain to the new 1x12 SRAM NX/GX Eagle system. Whether you are dropping your front derailleur system or going from a 1x11 to 1x12, this new group will give you a 500% gear range while keeping the simplicity of the 1x system.

eBay