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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@hippy
Or..
http://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Bicycle_headset_%28threadless%29_exploded_view-en.png/296px-Bicycle_headset_%28threadless%29_exploded_view-en.png