FAG Bottom Bracket cartridge BB66 (April 2014 – May 2017) 

For further assistance please contact the Brompton Customer Service team on: support@brompton.co.uk.

Message from Will Butler-Adams, CEO of Brompton Bicycle.


Use the Serial Number Checker below to see if your bottom bracket requires changing

How do I find my Serial Number

Each Brompton leaves the factory with a unique identifying serial number. The serial number can be found on the rear of the seat tube.

Please note: If you are unable to locate your bike serial number, please contact Brompton Support at support@brompton.com


Through our warranty and quality assurance process we have become aware of an issue affecting a component manufactured between April 2014 – May 2017.

The axle of the 3rd party supplied FAG Bottom Bracket has had higher than expected reported incidence of failure. Although this still meets international safety standards this does not meet the standards which Brompton sets for its components.

We have therefore initiated a programme to recall all affected bikes and replace the bottom bracket cartridge with a new and tested part, free of charge to all of our affected customers.

It is possible to identify if your bike is affected by referring to the serial number. The serial number can be found on a curved plate or silver sticker applied to the frame, as shown in the image below:


The bikes affected have serial numbers from 1403284144 to 1705150001 and can be any model, e.g. M, P, S or H type, or any other configuration.


In order to receive the replacement, please contact your local Brompton dealer who will fit a free replacement Bottom Bracket cartridge www.brompton.com/find-a-store.

We would like to apologise for any inconvenience caused by this replacement. We want our customers to be confident that in owning a Brompton bike, they are using the very best materials engineered to the very highest standards.

For more information contact the Brompton Customer Service team: Support@Brompton.co.uk

Frequently Asked Questions