Rock Shox Reverb AXS B2 Dropper Post

The RockShox Reverb AXS dropper seatpost (B2 version) now features a USB Type-C charger and pushes the limits of performance and simplicity even further with a complete technical redesign. Equipped with the SRAM AXS™ wireless electronic remote, it installs in seconds with no cables or hydraulic hoses. The Reverb AXS stands out with its 100% pneumatic Air-over-Air internal mechanism for outstanding reliability, an electronic module repositioned beneath the seatpost collar for maximum rear tire clearance, and innovative Active Ride technology that delivers remarkable comfort and extra traction on technical climbs.

RockShox Reverb AXS B2 dropper seatpost highlights

• 100% wireless SRAM AXS™ operation: Instant, effortless actuation at the touch of a button, customization through the AXS app, and an ultra-clean installation with no internal cable routing.
• Active Ride technology: Provides a few millimeters of light cushioning when the seatpost is not fully extended, improving traction and comfort on rough climbs.
• Air-over-Air internal system: Oil-cartridge-free pneumatic operation for greatly simplified maintenance and increased durability in all conditions.
• Increased rear wheel clearance: The electronic module is optimized around the saddle head/collar to prevent contact with the tire during suspension bottom-outs on aggressive frames.
• Huge travel range: Available from 100 mm to 250 mm (in 25 mm increments) to precisely fit different riders and frame geometries.
• Universal saddle clamp: Natively compatible with standard round rails (7 mm) and oval carbon rails (7x9 mm and 7x10 mm).

Technical specifications

• Model: SP-RVB-AXS-B2.
• Riding style: Cross-country, Trail, All-Mountain, Enduro, E-MTB (E-Bike).
• Material: High-strength forged and machined aluminum.
• Available diameters: 30.9 mm, 31.6 mm, 34.9 mm.
• Travel options: 100 mm, 125 mm, 150 mm, 175 mm, 200 mm, 225 mm, 250 mm.
• Mechanism: Infinite-height adjustment (Air-over-Air technology).
• Remote: Wireless AXS (remote sold separately).
• Saddle rail compatibility: Round 7 mm, oval 7x9 mm and 7x10 mm.
• Saddle offset: 0 mm.
• Manufacturer's weight: 712 g (31.6 mm x 548.2 mm version with 200 mm travel).
• Finish: Anodized black.

Materials and finish

• Body and stanchion: 100% aluminum alloy with anti-friction surface treatment
• Saddle clamp: Aluminum head with high-strength steel hardware
• Electronic module: IP69K waterproof housing, resistant to washing and water spray

Installation tips and usage recommendations

• Choosing the right size: Check the overall length and minimum insertion requirements for your frame. RockShox offers an online travel calculator to help you choose the right model.
• Frame collar tightening: Always use a torque wrench and specific assembly paste. Do not exceed the maximum torque recommended by the frame manufacturer, as this may prevent the post from sliding smoothly.
• Battery care: Remove the SRAM AXS battery and install the red protective cover when transporting your bike on a rack to preserve battery charge and protect the electrical contacts.

Package contents

• 1x RockShox Reverb AXS B2 dropper seatpost
• 1x SRAM eTap / AXS battery
• 1x Type-C battery charger (cable not included)