Video by Brompton Bicycle via YouTube
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Your derailleur shifts thousands of times over it’s lifespan and is subject to road grime and weather. Even with the best cleaning and maintenance regime it will eventually need replacing.
PLEASE NOTE: the cable clamp bolt maybe 4mm or 3mm.
How to set up your Deraileur – https://youtu.be/IWI_pmOs9zo
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Author: Brompton Bicycle