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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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@danmitch
I've been using the USB version of the Knog Boomer for a while now, very good, seem to be well built and have survived several good soakings and lots of mud. The front is a 'be seen' light rather than one suitable for lighting up a completely dark road or path. They charge relatively quickly and last well, very quick and easy to mount / unmount.