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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.
andyp
There is this: https://www.pitlock.de/en/shop/new-pit-stopper-antitheft-for-all-bicycle-components-with-allen-screws/pit-stopper.html