High performance lightweight & stiff 2014 alloy seatpost One-piece seatpost made from 2014 alloy tubing with a 3D forged head for increased strength & durability Easy to use secure single bolt wedge clamp design made from 2014 forged aluminium 2014 alloy is commonly used in the aircraft industry & a wide variety of high strength engineering applications making it the ideal choice to produce this lightweight strong & reliable head & clamp assembly Handy height-indicator on the rear of the shaft for quick setup 20 mm layback Weight 225 grams 27.2 x 280 mm