The new Reverb B1 Dropper Post 125mm from Rockshox is a whole new weapon. It features the same familiar looks as previous models, however it now features completely re-engineered internals to improve on its legendary performance and enhance reliability in all conditions. Even the smallest of details have been re-evaluated and updated to pass new harder and longer durability tests. This is engineered for the next generation of mountain biker. Available in Black, 390mm long only.