Crank Brothers offers the Joplin 4 Height Adjustable Seatposts with smooth hydraulic action. Designed for allmountain riding and racing The post adjusts via a lever attached to the saddle clamp sitting directly under the saddle Seatpost Diameter 30.9 or 31.6 mm Length 398 mm Color Black Seatpost Type Rigid Clamp Style Std Rails Minimum Height 75 mm Material Aluminum Weight 398 grams
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