RavX Pace Stem Carbon Fiber 100 Length, 31.8mm Lightweight yet Strong 4 Bolt Handlebar Clamp Conforms to Both EN MTB and Racing Standards Reversible Design for Different Riding Positions Angle: 5/ Weight: 126g(100mm)/ Handlebar clamp size: 31.8mm/ Steerer clamp size: 28.6mm/ Extension: 60mm-70mm-80mm-90mm-100mm-110mm-120mm