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 sprocket/cog installation...   Brompton BWR / 6 speed rear wheel sprocket installation    • Brompton BWR 6 speed sprockets