Piling on with the Brompton love here. Apartment friendly. Car trunk friendly. Motorcycle sidecar friendly. Their hardcase makes it airplane friendly. Theft-resistant, since it's carried and stored next to you more often than most bikes. The Brompton luggage system (its mount and low, forward position) is amazing. Bags can be massive and carry a lot of weight and the bike still feels great to ride. For pedals, I use…
Edit: the top comment (at this time) has a youtube link that shows it fold/unfold in like 8 secs. I can see the genius in it now