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The Brompton 4 speed Gear System

Derailleur gear systems will need occasional adjustment to keep them running smoothly, particularly in the early life of the product and as with all derailleur systems, the gearing on your 4 speed Brompton will require adjustment from time to time to keep it performing optimally.

While this may require a full reset of the gearing system, the gearing can often be adjusted at home by following some simple steps and without the need for any tooling.