As the forged headtubes are a little shorter then the welded headtubes a spacer is needed when using an scs compression system this scs spacer is designed to act as an integrated top cap and spacer it replaces the top cap of the headset and includes rubber sealsrequired when using a scs clamp with cam wards deckthe scs spacer is also integrated with a top caprubber sealedreplaces the top cap of the headset