RockShox

Reverb AXS XPLR A2 Dropper Seatpost - 50x400mm

RockShox Reverb AXS XPLR A2 Dropper Seatpost is a purpose-built wireless dropper for gravel bikes that use a 27.2mm seat tube, delivering on-demand saddle clearance for steep descents, loose corners, and technical terrain where body position matters. With 50mm travel in a 400mm length, it adds control without turning a gravel cockpit into a complicated cable-routing project, and its ActiveRide™ air-only internals are designed to stay solid at full extension while adding comfort and composure when riding rough sections with the post lowered.

Rapid gravel control, simplified

• Wireless SRAM AXS integration - Clean setup and fast actuation; rider-adjustable behavior through the AXS Mobile App for a personalized cockpit
• ActiveRide™ air-only internals - Fully rigid top-out for efficient seated pedaling, with built-in compliance available when riding with the post lowered for extra comfort and traction on broken gravel
• 27.2mm gravel-first fit - Made for modern gravel frames that prioritize a smaller post diameter and tuned ride feel
• IP69K waterproof and dustproof sealing - Built to keep working through mud, dust, washdowns, and all-weather riding
• Rail-friendly saddle clamp - Compatible with round rails and 7x10 oval carbon rails for broad saddle compatibility
• Shared AXS power ecosystem - Includes battery and charger (USB-C charger cord sold separately) compatible with other SRAM AXS components; requires an AXS Controller (sold separately)