Ritchey Adjustable Stem features a precision 3-D net shaped forged shaft that interconnects with a precision machined clamp.40mm stack heightPro model qualityOver 45 degree of angle adjustment throughout rangeAdjustment pivot is 30mm in front of steerer40mm HeightItem SpecificationsColorBlackWeight224gIntended UseRoadBar Clamp Diameter31.8mmStem Angle90-135degStem Length80mmSteerer Tube1-1/8" ThreadlessDefined ColorBlackS.H.I.S. Clamp Diameter28.6