Replacing single speed or BMX freewheel

If you ride around on a single speed bike or a BMX, then once every one to two years you need to replace the freewheel cog. It became apparent that my freewheel needed replacing on my bike after I kept hearing a clonking sound, each time I?d be applying a lot of pressure to the [...]

Source: http://www.londoncyclist.co.uk/replacing-single-speed-or-bmx-freewheel/

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