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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
http://www.sheldonbrown.com/frame-materials.html
http://spokesmanbicycles.com/page.cfm?PageID=157
http://www.caree.org/bike101framematerials.htm