Cannondale Headshok Mountain Stem Kit - 110mm x 20 Degree - Black - QSE110X20HS/BBQOriginal Cannondale stem with Headshok + Lefty 1. 0 1. 56" stem clamp diameter. This stem will work with Headshok forks and Lefty 1. 0 steer tubes. Lefty 2. 0 forks use a 1. 5 inch clamp and will not work with this stem. Manufacturer: Cannondale Model: C1 Headshok + Lefty 1. 0 1. 56" Stem Length: 110mm Stem Angle: + 20 Stem Clamp Diameter: Headshok + Lefty 1. 0 1. 56" Stem Length In Photos: 120mm Handlebar clamp diameter: 31. 8mm Today's Stock Status