A tachymeter scale calculates speed in units per hour (when you measure the seconds taken to travel one unit). Could be miles, could be metres.
@Regal started
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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A tachymeter scale calculates speed in units per hour (when you measure the seconds taken to travel one unit). Could be miles, could be metres.