SRAM's Red eTap AXS 1X D1 Electronic HRD Groupset is an intuitive, high-performance wireless groupset. At the core of this drivetrain is AXS - the electronic integration platform that allows you to personalize the groupset from an app on your phone and execute your choices while riding. Orbit chain management provides a reassuringly quiet, secure, and smooth ride, no matter the terrain. This groupset includes all electronic components needed for a 1x setup - hydraulic brake/shift lever pair, front and rear post mount disc calipers, 160mm 6-bolt disc rotors, short cage rear derailleur, battery, charger and cord, and a Quick Start Guide.