The ShockStop Endurance Suspension Seatpost provides 35mm of tunable ultra-responsive suspension travel for the ultimate bump-eating comfort. Ride further faster and more comfortably on the bike you already own while the suspended seatpost lets you float over rough terrain. The Endurance version features an adjustable dual spring for an active plush ride feel.Reduces fatigue from bumps and vibrations so you and ride farther and more oftenRide faster and reduce fatigue utilizing energy that is normally wasted suspending your body and is converted into forward motionCustomize your suspension feel to float over obstacles and maintain control35mm of active suspension travel with infinitely adjustable stiffness via pre-load adjustment and swappable springsAdjusting stiffness / pre-load does not reduce travelSwappable springs included to accommodate heavier riders and/or ride preferenceOptimized linkage geometry provides ultra-responsive suspension