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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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Mule 
@woods_alexis
Came across this pretty nice idea for a CO2 pump that utilises the space in Shimano Hollowtech II cranks;
https://www.kickstarter.com/projects/crankpump/crankpump-the-invisible-bike-pump