OneUp Components V3 Dropper Post (90mm) 31.6 x 270mmThe lightest infinitely adjustable dropper post available Shortest total length of any dropper post (measured seat rails to end of actuator) 30mm stack height is the shortest of any dropper post Low friction SKF seal IGUS self lubricating bushings (180, 210 & 240mm posts have an additional bushing) Cartridge does not require inflation and is 100% recyclable Travel adjust shims allow travel customization of either 10 or 20mm (2 10mm shims included with