Rockshox reverb dropper seatpost the only dropper post that lets you control both position and return speed so your seat is always where you want it without any surprises and unlike cable operated posts reverbs hydraulic remote lever and system is contamination proof to ensure miles of reliability features weight 520g 100mm 535g 125mm material shaft 3d forged 7050 alloy head 7050 forged alloy finish anodized other zero offset reverb remote actuation adjustable return spee