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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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@gbj_tester
I've got a 9t BMX driver on my roller bike, and it is indeed as rough as a badger's arse. The 56t chainring at the other end is as smooth as the proverbial baby's bum, so it's swing and roundabouts :-)