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For over 20 years, Cane Creek's Thudbuster has been the industry standard in suspension seat posts by providing unequalled comfort and reliability to riders around the world. Travel: 50mm (1.97")Seat clamp: Single bolt fastening and angle adjustment designElastomer: 2-piece design, tool-free inner elastomer changes for various rider weightPivots: Threaded, serviceable, hard anodized aluminium axles flanged PTFE bushingsRider Weight Limit: 150kg/330lbSizes: 27.2mm, 30.9mm, 31.6mm (additional diameters available with shim)Length: Minimum 100mm, Maximum 274mmWeight: 580g (31.6mm)The Thudbuster G4 is superior to its predecessor in every way. Building on Thudbuster s proven parallel linkage technology we have completely re-designed the seatpost for increased durability, a higher rider weight limit, additional suspension travel, a single bolt seat clamp design as well as ease of use through tool-free elastomer change. By improving on this already legendary design, we re confident to say that the Thudbuster G4 is the most advanced suspension seatpost ever made.