Ran into a bump after I was loading the “sprocket upgraded” to the Brompton last night. The larger 18T sprocket was actually in contact with the rear triangle that stops the wheel from rotating.
Once I got the triangle “touched up” for the larger sprocket, I went out to a perfect place to try out the new gearing setup.
00:40 Modding the Brompton rear triangle to fit the larger sprocket
04:27 Riding out to test our the gear settings
05:28 The results