RockShox Reverb AXS Seatpost B1

The RockShox Reverb AXS Seatpost B1 cuts cables and clutter out of the dropper equation entirely — wireless actuation means no hose routing, no lever bleed, and no mechanical complexity running through your frame. Pairing with the SRAM AXS ecosystem via the AXS app, it shares a battery and charger with compatible AXS components, so your cockpit stays clean and your charging setup stays simple.

Inside, a redesigned air-over-air system is built for long-term durability and straightforward servicing, with replacement parts available for every major internal. The B1 also introduces ActiveRide — a compliant platform that engages when the post is in a dropped or partially extended position, providing subtle give on technical climbs and loose terrain where a rigid platform would cost you traction. When you're fully extended and pushing hard, the post locks out firm. Travel options run from 100mm to 250mm in 25mm increments, covering short-travel trail builds through long-travel enduro rigs, with both 30.9mm and 31.6mm diameters available.

RockShox Reverb AXS Seatpost B1 Specs at a Glance

• Actuation: Wireless AXS — no hydraulic hose or internal cable routing required
• Travel options: 100mm, 125mm, 150mm, 175mm, 200mm, 225mm, 250mm (25mm increments)
• Diameter options: 30.9mm and 31.6mm
• Internal design: Air-over-air system with serviceable internals
• ActiveRide: Compliant platform when post is partially or fully dropped