When you're ripping through rolling terrain, cranking the pedals one minute & getting off the back of the bike the next, no seat height is ?just right?. Reverb gives you infinite seat-height adjustment & control of your return speed in a hydraulically actuated remote package. A custom sealing system means the plush & consistent feel of this seat post won?t degrade, no matter how much the weather does. Weight 100mm: 535g, 125mm: 520g, * Weight based on 355mm length, 30.9mm diameter, MMX remote with shifter hardware & 1300mm hose Length 100mm: 355, 420mm, 125mm: 380mm, 420mm Colors Black, Silver Material Shaft: 3D Forged 7050 Alloy, Head: 7050 Forged Alloy Finish Anodized Other Zero Offset / 2-Bolt, Reverb Remote Actuation: Adjustable return speed at the handlebar Available in Travel: 125mm & 100mm, Diameters: 30.9mm & 31.6mm