The zero 100 pista stem is a track racing specific stem from deda it was the star of the london olympics in the velodrome fully 3d forged from 2014 alloy with fibre orientation in the directions of the lines of force 70 degree angle drop with a 317mm handlebar clamping diameter available in anodized matt black in 90mm 100mm 110mm 120mm 130mm or 140mm