Thanks for your thoughts. Yes, I test rode the 4-speed T-Line in NYC at the Brompton Junction Store on Bleecker St. I would like to test ride the Helix Ultralight, or any Helix. If anyone lives in NYC and would allow me to test ride their bike, I'd be very grateful. I've read that the Helix is stiff and uncomfortable to ride. I don't know. I was even thinking about getting a Tern Verge X11. The T-Line and Helix are both supercool bikes but if there's a folding bike that's faster, more comfortable, and less fatiguing over long distances, I would consider it. In NYC, the roads are awful. Potholes and torn up streets everywhere. I'm even considering an e-assist bike, perhaps 250 watts. It's amazing to see how fast big, clumsy 65lb. Citi-E-bikes are with 500 watts.