For the BB , Asia adopted the British threading pattern , so abundant choices.


I manage to gain more hand positions with Ergon's grip/bar-end ,, and figure 8 bend Trekking bars ..

But none of mine are Dahons..


there are 2 speed gearbox cranks, and now a 3 speed too .. chainring turns at a different rate than the crankarms..

no derailleur needed..





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