Okay, so I'm lifting this topic directly from the notoriously knuckleheaded Road Forum, but indulge me a bit here, because as I was reporting in the 'What's your top speed' thread on a new top speed attained on my Dahon Mariner, it occurred to me that going fast on a folder is a whole different game from a traditional, full sized diamond frame.
So, that speed for me, was 37mph, reached the night before last while I was visiting in Pittsburgh. The Dahon wasn't bad, but confidence inspiring it wasn't. Some of it is my fault, for not keeping the brakes in tip top order, but also there was quite a bit of it was the bike just being unstable at those speeds. I'd probably have gone faster had I had more brake power, but it wouldn't have been the smartest thing, I don't think.
And what about you guys, the experienced small-wheelers...how fast would-- have-- you gone on your folding bike?