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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.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Emyr
Some trials riders run fixed cogs (freewheeling cranks) with disc brakes. This website also has a "sort by weight" option on its lists:
http://www.tartybikes.co.uk/135mm_fixed_hubs/c21.html