Giant Connect SL OD2 Over Drive 2 Stem features an oversized construction to fit 31.8mm steerer tubes &40;or 28.6mm with shim&41; for accurate reassuring handling properties. 3D forged from lightweight 6061 aluminium. Features- Single piece 3D forged 6061 construction- Fits 31.8mm or with shim 28.6mm steerer tube- 31.8mm x 46mm handlebar clamping area- Flip flop +/-8° angle adjustment requires fewer headset spacers Sizes- Stem lengths: 70mm / 80mm / 90mm / 100mm / 110mm / 120mm