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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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@Emyr
I ride the same route every day, about 1 in 10 rides has either a GPS error which throws me 300m off the road or 100m into the air, or a few miles with no data points.
I use a 2 year old Samsung GalaxyS(1).