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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.
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@hippy
www.parktools.com as mentioned in 1489 previous posts so far..
http://strongframes.com/material_tech/metallurgy/3/?PHPSESSID=5454b2d278e3a3ba75f60a0e26957677 materials
http://www.cyclingnews.com/tech/ pretty pics of lots of bikes and bits
http://www.analyticcycling.com/ for uber cycling nerdage