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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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lynx
@LWaB
Spa Cycles used to sell a C-shaped steel clip for about £4 specifically to stop the SWB Brompton rear triangle from dropping when the saddle was lifted. It arched over the suspension block and was released to allow the fold to start. The Spa clip was completely obsoleted when the LWB frame was introduced, along with its new frame clip.