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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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Kimmo
@HorseAdventure
Shimano Front Freewheel System (FFS)
This aptly-acronymic system included a fixed rear gear cluster and a crank-mounted freewheel. This made it so the drive train was always in motion whenever the bike was in motion. The idea was so that a rider could shift while coasting, but maybe having the chainrings always spinning during the time of bootcut and bellbottom pants wasn't the best idea. Most common on old Schwinns.