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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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I have a new Freschi frame I want to build into a 5 speed. It has a 70mm Italian BB and I want to fit a 1989 Campag Chorus chainset with one ring (obviously) on to it. What width of spindle would I need?
Is there an equation for working this out?