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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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@Spiny
49x20 for 66 GI (20 skid patches)
49x19 for 70 GI (19 of yer patches)
Envisage going one tooth less (73.5 GI) - may be the limit for my puny legs.