The One Up EDC Stem Cap/Preload Kit includes an EDC ready headset top cap, a headset bearing preload assembly, 40mm of integrated headset spacers, and an EDC steerer plug. When installed into the OneUp Stem it creates an EDC ready stem that does not require threading your steerer tube. The OneUp Stem has a recess in the bottom of the body to house the Preloader assembly with a third bolt at the steerer clamp which you use to adjust the preload. Tightening the Preload Bolt on the back of the stem pulls the collar together, which tightens the internal cone and pushes the conical headset spacer down away from the stem and preloads your headset.  One Up EDC Stem Cap/Preload Kit Features Stem EDC Top Cap EDC steerer plug Stem Preload assembly 2x 10mm, 2x 5mm, clip in headset spacers