This is just a short illustrated walk through the replacing of the rear sprockets on a 6-speed Brompton.
![](http://www.ready-made.de/wp-content/uploads/DSC_1875-300x200.jpg)
1.
Go an get yourself a new Brompton sprocket/disc set to fit on the Brompton/Sturmey Archer wide range (BWR) rear hub ( if this is the hub you run in your Brompton). The set includes a nylon chain guard, a 13 and a 16 teeth sprocket, a spacer and a circlip.
![](http://www.ready-made.de/wp-content/uploads/radmutter-300x106.png)
2.
Remove on the right side
- the Gear indicator chain
- the chain tensioner nut
- the chain tensioner
- and finally the axle nut.
![](http://www.ready-made.de/wp-content/uploads/DSC_1884-300x200.jpg)
3.
Remove the axle nut on the left side. Now you can remove the rear wheel
![](http://www.ready-made.de/wp-content/uploads/DSC_1886-300x200.jpg)
4.
Remove the circlip with a screwdriver. It’s easy – not much power needed.
![](http://www.ready-made.de/wp-content/uploads/DSC_1890-300x200.jpg)
5.
Remove all sprockets, the spacer and the plastic guard
![](http://www.ready-made.de/wp-content/uploads/DSC_1892-300x200.jpg)
6.
The old stuff is gone now – time to start with the new parts.
![](http://www.ready-made.de/wp-content/uploads/DSC_1894-300x200.jpg)
7.
Clean the hub and add some grease to the threads of the hub
![](http://www.ready-made.de/wp-content/uploads/DSC_1896-300x200.jpg)
8.
Reassemble everything with the new parts. We start with the plastic guard and the larger sprocket.
![](http://www.ready-made.de/wp-content/uploads/DSC_1899-300x200.jpg)
9.
Finally the spacer, the smaller sprocket and the clip:
- plastic guard
- large sprocket
- spacer
- small sprocket
- clip
![](http://www.ready-made.de/wp-content/uploads/DSC_1901-300x200.jpg)
10.
Finished. Just remount your wheel into the Brompton and you are done
Video
If you still need some more input/help – try this video made by Brompton.
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3 responses to “How to change the rear sprokets on a Brompton”
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[…] two small sprockets to double the available options of the rear hub […]
Hi can I ask you a Brompton question technical is this a live chat? I need advice on fixing worn chain and sprockets
Hi Chris,
this is no live chat – sorry – you can ask me if you like and I’ll do my best to answer – but it may take a while.
Best,
Detlef