Rock Shox Reverb AXS B2 Dropper Post No Cables. No Limits. Riders who want a fully wireless cockpit now have that option Reverb AXS completes the AXS ecosystem by giving riders customizable controls. The Reverb AXS B2 cuts the cable entirely, pairing with any AXS controller via wireless activation so you can drop or raise the saddle without taking your hands off the bar. The air-over-air internals are a step forward in durability, and when actuated the Active Ride technology keeps the dropper post from feeling like a rigid pogo stick under you on technical terrain. The B2 update brings USB-C charging to the platform, all with improved battery clearance. Features Wireless AXS actuation no cable or housing required; pairs with any AXS controller for on-the-fly saddle height adjustment Air-over-air internals more robust and durable design compared to previous-generation hydraulic internals, with tool-friendly disassembly for straightforward servicing Active Ride technology engages when the post is dropped, providing a subtly compliant platform on technical terrain and E-MTB climbs without sacrificing rigidity at full extension Shared AXS battery same battery as AXS derailleurs and brakes; 25g battery weight, sold separately from post USB-C charging port (B2) updated from micro-USB for faster, more universal charging compatibility Universal saddle rail compatibility fits 7x7, 7x9, and 7x10 rail configurations Specifications Available Travels100mm, 125mm, 150mm, 175mm, 200mm, 225mm, 250mm Available Diameters30. 9mm, 31. 6mm, 34. 9mm Offset Zero Actuation Wireless (AXS battery-powered)Cable Routing N/A (wireless)Remote / Lever Type AXS Controller (sold separately)Remote Included No Weight712g (200mm, 31. 6mm, without battery); battery 25g In the Box Seatpost, USB-C Charger (no cable)Intended Use Trail, All-Mountain, Enduro, E-bike Key Measurements A: Travel100mm125mm150mm175mm200mm225mm250mm D: Min. Insertion Length80mm80mm80mm80mm80mm80mm80mm | Sram | Rockshox Reverb Axs B2 Dropper Post 30. 9Mm, 225Mm Travel | Aluminum