Brompton 3 to 6 speed upgrade - is it possible? 

One of the questions we often get asked is ....
"I have a Brompton 3 speed - is it possible to upgrade it to 6 speed?"
The answer is, yes - but maybe not as easily as you may think
The 3 speed Brompton folding bike uses a 3 speed only wheel, the 6 speed Brompton uses a 3 speed hub combined with a 2 speed derailleur - giving 6 gears, and the sprockets / wheels are different
In this video we explain why - and a possible half way solution
We also show a bit of history relating to the different Brompton wheels
If you are looking for information on how to install the sprockets onto a wheel - see below:
Brompton BSR / 3 speed rear wheel sprocket installation
• Brompton 3-speed sproc...
Brompton BWR / 6 speed rear wheel sprocket installation
• Brompton BWR 6 speed s...