take the millimetre measurement between two chainring bolt holes then times 1.7 for a five arm crank spider or 1.4 for a 4 arm et voila!
@saxby's started
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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take the millimetre measurement between two chainring bolt holes then times 1.7 for a five arm crank spider or 1.4 for a 4 arm et voila!