Ritchey wcs stubby seatpost replacement shaftthe ritchey wcs stubby is for use with select frames with integrated seat tubes patented sidebinder one bolt clamp design facilitates easy installation and adjustment featuresincreased range of adjustment over other clamp systemsdesigned for frames with integrated seat tubesplease note does not include any clamp hardware shaft only specificationsmaterial 2d forged 2014 alloyoffset 8 or 25mm finish wet blackweight 110g 30 25x50x8mmbuyritch