IVEKE The Light 1 1/8 Carbon 31.8 Bicycle MTB Road Bike 6 STEM 60 70 80 90 100 110 mm (60mm) Go to amazon.com Related posts How to buy the best stem carbon bike? FeatureSteerer Tube Diameter28.6mm = 1 1/8''Handlebar Clamp Diameter: 31.8 mmweight: 95 ---- 120gangle: + / - 6carbon fiber aluminum alloy Description[ Materialcarbon fiber aluminum alloy ] [Steerer Tube Diameter28.6mm = 1 1/8'' ] [ angle: + / - 6 ] [ weight: 95 ---- 120g ] [ Handlebar Clamp Diameter: 31.8 mm ]