What Ed said. And the others--you should be ashamed of yourselves. That cardboard is of course the headset shim. Without it, you won't be able to trackstand. ;)
@Oliver Schick started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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What Ed said. And the others--you should be ashamed of yourselves. That cardboard is of course the headset shim. Without it, you won't be able to trackstand. ;)