I'm new to commuting by bike, and I'm very interested in the Downtube for use on the Caltrain system. It's great to hear these thoughtful posts by both owners and designer.
A few possibly picky questions:
* When folded, is there a device to keep the bike folded together or would you need a bag?
* What's a realistic folding time? 20sec?
* Is it comfortable to carry folded sans carrying case? (If, for example, the frame acts as a carrying grip.)
* How conceivable is it to add a grocery front pannier?
Thanks in advance!