Our intention with Reverb™ AXS® was inventive and pure. No hoses. No routing. No energy wasted. Not a single thing in the way of the experience. We created a reliable wireless-electronic dropper post and controller that actuates with drastically less effort and zero distraction. Expanding what's possible on a bike, Reverb AXS is enabled by SRAM AXS™ technology, a new level of interaction, personalization, and connectivity across all AXS enabled components. FEATURES Effortless Electronic-Wireless actuation and infinite height adjustment with a single touch. Clean, simple and fast to install. No hoses to route, no fishing required. Updated internals for faster return speed in all conditions. New Vent Valve Technology, a simple and reliable built in service solution without disassembly of the seatpost. SRAM AXS™ technology, a new level of interaction, personalization, and connectivity across all AXS™ enabled components. Includes rechargeable AXS remote, SRAM battery and charger. Compatible with 7mm round rails and 7x9mm oval rails. SPECIFICATIONS POST DIAMETER: 30.9mm, 31.6mm, 34.9mm TRAVEL: 100mm, 125mm, 170mm SADDLE RAIL COMPATIBILITY: Round (7mm) Oval (7x9mm) WEIGHT: 676g WEIGHT BASED ON: 170mm 31.6 W/O battery - Battery 25g MODEL ID: SP-RVB-AXS-A1