The Ultimate Duro is made to be strong, light and durable; this 10mm layback post is designed using the most up to date composites and computer aids to create the carbon best lay ups to ensure this post does everything you need from hard hitting and flowing trails.*Supplied with standard 7x7mm clamp. Other size clamps to fit oval carbon rails are available. Please see the saddle manufacturers measurement, if the rails are wrapped please check the measurements are still valid.Technical SpecsWeight161g (300X27.2), 221g(400X27.2), 167g(30.9X300), 203g(30.9X400), 170g(31.6X300), 222g(31.6X400)Length300mm, 400mmDiameter27.2mm, 30.9mm, 31.6mmMaterialCarbonSetback10mmFinishUD MattSeatpost Clamp Recommended Torque12Nm