I managed to obtain an aluminum disc fork intended for Chinese domestic Dahon frames, but the steerer tube is about 12 mm too short for my Novara Flyby (= Dahon Mu) frame. I did some digging and found that there are at least two Dahon headtube lengths: 87 mm and 99 mm. My aluminum frame, as well as a few Terns I looked at, are 99 mm.
Does anyone know which frames have 87 mm headtubes? From what I found, that might include the steel Dahon Speed frames. Thanks.