RavX XRD Carbon Stem Super Lightweight in 7 Lengths for a Perfect Fit Full Titanium bolt set - 4 bolt handlebar clamp Reversible Design Double Butted Extension Angle: 5/ Weight: 96g(100mm)/ Handlebar clamp size: 31.8mm/ Steerer clamp size: 28.6mm/ Extension: 60mm-70mm-80mm-90mm-100mm-110mm-120mm