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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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@Polygon
Ah, the slotted ones like this you mean?
http://fcdn.mtbr.com/attachments/one/713646d1343607785-whats-latest-inbred-swap-out-bb7-imageuploadedbytapatalk1343607785.347892.jpg