Sram reset the world of mountain bike drivetrains with the introduction of their XX1 and X01 Eagle AXS drivetrains and their incredible wireless derailleurs and controller. Now they have reset it again with the incredible GX Eagle AXS Upgrade Kit, which brings faultless, easy to install wireless shifting to your existing Eagle drivetrain at an incredible new price point.12-speed wireless electronic drivetrain is easy to install and shifts flawlesslyGX Eagle AXS derailleur features 10mm shorter cage for more clearance, improved chain wrap and better shiftingEagle AXS Controller is simple, easy to use and can be customised with other AXS componentsIncludes GX Eagle AXS Derailleur & battery, Eagle AXS Controller & chargerThe term game-changing is often over-used; for Eagle AXS it is entirely apt. SRAM have designed the new GX Eagle AXS rear derailleur and Eagle AXS controller to take that same performance and bring it a new, lower price, making it perfect for a wide range of bikes, from