The SRAM RED eTap AXS Electronic system is an intuitive, high performance wireless groupset. At the core of this drivetrain is AXS - the electronic integration platform that allows you to easily personalize the groupset right from your phone and enable your choices while riding. Orbit chain management provides a reassuringly quiet, secure and smooth ride, whatever the terrain.Groupset includes all electronic components for a 1x setup in a single package - hydraulic brake/shift lever pair, front and rear flat mount disc calipers, 160mm disc rotors, rear derailleur, battery, charger and cord, and Quick Start GuideRED eTap AXS HRD Brake/Shift System features simple and intuitive eTap shift logic and is AXS enabled for easy personalizationThe HydroHC brake platform includes a two-piece caliper for a more positive feelThe RED eTap AXS rear derailleur features Orbit chain management technology to keep the drivetrain quiet and secure, and is enabled with SRAM AXS for easy personalizationRear derailleur includes optimized motor and signal travel for faster shifting, and is compatible with existing eTap batteriesTo complete your groupset, purchase a crank, bottom bracket, cassette, and chainRED eTap AXS(TM)SRAM RED eTap AXS(TM) allows riders to push boundaries without any distractions. This intuitive and high-performance electronic groupset works smarter to offer wider range, and more useful gear progression. Shifting is quiet, secure, and smooth whether on tarmac or gravel with the help of Orbit chain management technology. RED eTap AXS(TM) can be completely personalized to the individual rider, so you can explore limits like never before.The RED eTap AXS HRD Shift/Brake SystemThe HRD shift/brake system offers fully wireless electronic shifting with fully hydraulic disc braking. It is AXS(TM) enabled for ultimate customization. eTap keeps shifting simple and intuitive, with large shifting paddles that are textured for an improved feel and designed with two Blip ports each. Fit and lever preferences can be adjusted with SRAM's Contact Point Adjustment and Reach Adjust technologies. Bleeding Edge technology allows for easy and clean brake bleeds.The RED eTap AXS(TM) Rear DerailleurSRAM's RED eTap AXS(TM) rear derailleur is designed around its advanced Orbit chain management technology. It utilizes silicon fluid as part of an elegant and ultra-lightweight damper system to reduce chain bounce, and places no additional resistance on the derailleur's spring when under slow or light movement for easier shifting and rear wheel removal. Its updated motor and signal travel allow for instantaneous wireless shifting. Large X-SYNC pulleys and ceramic bearings provide extra efficiency and durability while riding. The RED eTap AXS(TM) rear derailleur is AXS(TM) enabled for ultimate personalization, and is compatible with existing eTap batteries.The AXS(TM) AdvantageControl, personalize and monitor. AXS(TM)-SRAM's bike component integration system-takes eTapA(R) wireless shifting to the next level. The SRAM AXS(TM) app allows riders to see battery status, change component behavior, personalize controls, get maintenance reminders, and update firmware. A smaller eTap AXS(TM) BlipBox(TM) easily integrates into aero frames for improved aerodynamics and a super sleek appearance. AXS(TM) allows you to mix and match Road and MTB components for a completely customized experience.In The BoxGroupset Includes:Red eTap AXS HRD Right Brake/Shifter with Flat Mount CaliperRed eTap AXS HRD Left Brake/Shifter with Flat Mount Caliper160mm Centerline XR Disc Rotors (2)Red eTap AXS Rear Derailleur w/ BatteryBattery Charger and CordQuick Start GuideTechSRAM RED eTap AXS groupsets require SRAM XDR compatible hubs. The XDR interface is 1.85mm longer than XD and is designed for road hub applications. This allows XDR compatible hubs to match the geometries of 11-speed road driver bodies. XDR driver bodies are compatible with all XD cassettes when the cassette is installed with a 1.85mm spacer. See diagram for fitting an XDR hub with an 11-speed XD Cassette. Any hubs equipped with XDR freehubs can be converted to an 11-speed road freehub body for use with a non-XD cassette.