DVO Topaz Air Shock 8.5 x 2.5/ 215 x 63mm Adjustable air-spring allows for tuning progressivity, bottom out resistance and amount of travel via volume spacers. A compressed, closed damping cartridge bladder eliminates breakaway forces and offers small bump sensitivity High Flow Emerald Piston eliminated harshness and delivers dynamic damping Use Igus 5-piece bushing spacer kits Open-Medium-Firm Quick Range Compression system for climbing, traversing and descending