For over 20 years, Thudbuster has been the bicycle industry standard in suspension seatposts by providing unequaled comfort and reliability to riders around the world. Parallelogram design does not change the distance between the seat and pedal Completely re-designed the seatpost for increased durability Suspension travel 90mm/3.54'', same weight limit as previous model 2-piece tool-free elastomer change and a single-bolt seat clamp design Threaded, serviceable, hard anodized aluminum axles flanged PTFE bushings Single bolt fastening and angle adjustment design