RavX Herculite 90mm, 31.8mm Stem Clamp Gloss Carbon Handlebar Stem Superior Strength and Performance Lightweight Carbon Fiber with AL7075 reinforcing Carbon Bolt Handlebar Clamp Reversible Design for Different Riding Positions Angle: 8/ Weight: 10g (100mm)/ Handlebar Clamp size: 31.8mm/ Sterrer Clamp size: 28.6mm/ Extension: 90mm-100mm-110mm-120mm