Gravity Exa Form 900i Dropper Post - 30.9/31.6mm - 170/190mm Travel

The Gravity Exa Form 900i is a hydraulic dropper seatpost designed for mountain and gravel riders seeking long-travel saddle adjustment at a competitive price. Available in 30.9mm and 31.6mm diameters with 170mm or 190mm of travel, it gives riders the ability to drop their saddle significantly for steep descents and technical sections, then raise it back up for efficient pedaling on climbs and flats. The hydraulic mechanism is integrated inside a 7075 aluminum alloy tube, balancing durability with weight savings — the lightest configuration comes in at approximately 480g, while longer options weigh up to around 670g.

The dropper is built exclusively for frames with internal cable routing, and both the remote lever and cable come included so there is nothing extra to source. One critical consideration is the overall post length: at 470mm for the 170mm travel version and 500mm for the 190mm travel version, these are notably long posts. Riders with smaller frames or shorter inseams should carefully measure their available seat tube depth and minimum insertion length before committing. For those whose frames can accommodate the length, the Exa Form 900i delivers reliable hydraulic performance and generous travel that makes aggressive trail riding and enduro-style descents considerably more approachable.