Originally Posted by
champignon
Can the 3 speed be retrofitted to become a 6 speed (or whatever)?
This company offers a kit but says it does not fit all 3spd Brampton's.
http://www.comptoncycles.co.uk/m5b0s...Conversion-Kit
Here is a more complete kit, also with some restrictions
http://brilliantbikes.co.uk/brompton...099012091.html