Cane Creek 40-Series EC (External Cups) assemblies feature press-in cups with bearings outside the frame. The 40-Series is the workhorse of Cane Creek's headset line-up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long-lasting headset. SPECS : S.H.I.S. Stem Clamp Diameter: 28.6 Threadless Bearing Type: Cartridge S.H.I.S Upper: EC34 Weight: 50g Upper Stack Height: 16mm