Originally Posted by invisiblehand
Isn't that how the 6-speed Brompton is achieved?
In the old days you had two 1/16" spacers and a 1/8" cog. 22/19 is a mathematically perfect 1/2 step on an AW and nice sizes for 26" wheels. Cogs under 16t weren't dished, so small wheel options were limited
But the newer hbs have only about 0.150" between the dust cover and the snap ring. Brompton must use special, thinner cogs to make it work.