>>1215432>>1215438I think there is two types of 6 speed hubs for brompton, one is the average, and the another one is for hilly terrain, the chainring is pretty big, but probably you can swap it with a bigger one if you want sanic speed.
As for the bars, I think the flat one is the most roadie oriented bar, because the rest are for more upright position and then there is the buterfly bar which is for tourers and weird travelers.
