Making a BMX crank bolt drive expander/spacer for chainring – In the workshop
Автор: Fixed Mindset
Загружено: 2026-02-22
Просмотров: 22
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I've been rebuilding a bike that came with a somewhat unusual BMX style 3-piece crankset. The drive side crank is a bolt-drive style, however there is no bolt – just a knob that drives the chainring. The welds and finish look all factory, so it's likely this is the original design.
To get the crank drive working properly, I needed an expander to space our the gap between the crank knob and the chainring (which is very worn). In this video, I'm fashioning a spacer out of plastic.
Enjoy #fixedmindset
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