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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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@Oddo
LandRider Auto Shift - An automatic derailleur using flyweights and centrifugal force to move the derailleur cage outwards to shift into a higher gear when cycling at a faster pace.
More on Disraeli Gears and in this GCN video
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