The RockShox Reverb AXS XPLR dropper post delivers more control, confidence, and fun on gravel roads everywhere. Getting the saddle out of the way means more room to move, saving you from awkward maneuvering and sketchy descents. Its design is complete with lightweight air-only internals featuring built-in compliance called ActiveRide . It's like travel for your saddle. Enabled by SRAM AXS technology, Reverb AXS XPLR is part of the ultimate personalized cockpit.Includes battery and charger (USB-C charger cord Sold Separately) that's shared with all other SRAM AXS enabled componentsSystem is completely waterproof and dustproof to IP69K - take it anywhereSaddle clamp is compatible with round rails, as well as, 7x10 oval carbon rails27.2mm Reverb AXS XPLR delivers more control, confidence, and fun for gravelActiveRide - Air only internals provide a fully rigid top-out positionWith the touch of the required AXS Controller (AXS controller sold separately), you ve got built-in compliance to ensure comfort and control over the roughest sections of gravelAXS Technology allows rider customization via the AXS Mobile AppItem SpecificationsActuationWireless RemoteAdjustmentInfiniteCable RoutingWirelessClamp Style7x9 RailsClamp StyleStandard RailsColorBlackDefined ColorBlackDiameter27.2Length350Max Height275Min Height101Offset (mm)0Travel (mm)75 RockShox Reverb AXS XPLR Dropper Seatpost Dropper Seatpost UPC: 710845929588