Thomson X4 Mountain Stems feature smooth edges for carbon bar compatibility and use bolts that are custom heat treated with corrosion preventative plating.169g, 110mm length31.8 bar clamp diameter with smooth edges for carbon bar compatibilityMachined 7000 series extruded bar stockBolts are custom heat treated with corrosion preventative platingStack height is 41mmUse SM5320 to adapt 1-1/8" threadless stem to 1" threadless steererItem SpecificationsColorBlackWeight169gIntended UseMountainBar Clamp Diameter31.8mmStem Angle90degStem Length130mmSteerer Tube1-1/8" Threadless,1 1/8" to 1.5" TaperedDefined ColorBlackS.H.I.S. Clamp Diameter28.6