Crank Brothers offers this Height Adjustable Seatpost with smooth hydraulic action and includes a remote for onthefly operation. Designed for allmountain riding and racing Manual release lever under the saddle activates the post and is controlled by a remote lever assembly on the handlebar Seatpost Diameter 30.9 or 31.6 mm Length 382 mm Color Black Seatpost Type Rigid Clamp Style Std Rails Minimum Height 75 mm Material Aluminum Weight 461 grams