RockShox Reverb AXS B2Reverb AXS completes the AXS ecosystem by giving the rider customizable controls, easy install, and a shared battery, charger, and controller. Built for GX, X0, and XX riders, Reverb AXS ensures smooth control and reliability for every rider running a 100mm up to a 250mm dropper post, all with improved battery clearance. Travel options include 100mm, 125mm, 150mm, 175mm, 200mm, 225mm, 250mm Air over air design that is more robust and durable