When youre ripping through rolling terrain cranking the pedals one minute and getting off the back of the bike the next no seat height is just right reverb gives you infinite seat height adjustment and control of your return speed in a hydraulically actuated remote package a custom sealing system means the plush and consistent feel of this seat post wont degrade no matter how much the weather doesweight 520g weight based on 355mm length 309mm diameter mmx remote with shifter hard