Brompton used to use the shift out both ends 5 speed, then as written in the Brompton Book , the supply dried Up.

The next source was Sachs Making the first 2 cog 3 speed 6 speed , for them.(Sachs was Bought out by Sram)

Now the New source is back to Sturmey Archer, But the company changed hands and now comes from Bicycle Island, TW ROC.

Their current 5 speed wont fit in the standard Brompton rear width; less than 120mm ..

http://www.sturmey-archer.com/files/...0IGH%20C50.pdf

125 is the narrowest overlock nut spec offered.






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