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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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@Kirth
A friends just launched their new product
http://www.zepp.com/
Looks interesting. Tracking swing on golf/baseball/tennis ....
I'm also eagerly awaiting my Trace
http://www.kickstarter.com/projects/activereplay/trace-the-most-advanced-activity-monitor-for-actio