The Brompton G Line actually uses the same chain set and chain rings as the traditional 16 inch wheel Brompton folding bike - this chain ring is available in 3 sizes:
Changing the chain ring to a smaller (or larger on ...
The Brompton G Line actually uses the same chain set and chain rings as the traditional 16 inch wheel Brompton folding bike - this chain ring is available in 3 sizes:
Changing the chain ring to a smaller (or larger on - though this seems to be rarely done is a simple job - but will need a change to the chain length to cope with the new ring size)
We made the above video to show how easy it is to change the chainring size - it was filmed on a Brompton 16 inch wheel bike - but the process of changing the chainring is exactly the same on a G Line
Replacement BLACK edition 44T Brompton chain ring / guard assembly - 44 teeth - for the Brompton "spider" crank.
Replacement BLACK 50T Brompton chain ring / guard assembly - 50 teeth - for the Brompton "spider" crank set
Replacement BLACK edition 54T Brompton chain ring / guard assembly - 54 teeth - for the Brompton "spider" crank set. 54 teeth is the standard on a 1 and 2 speed Brompton
Replacement Brompton BLACK edition left-hand rank - for 2013 onwards "spider" cranksets
Replacement Brompton BLACK edition right-hand "Spider" crank - suitable for fitting standard 15mm pedals and for fitting to the Brompton JIS bottom bracket