"A-Bike Electric is the smallest lightest folding e-bike ever"

[J.R.]

Don't think I'd want to hit a pothole with it (or go in one), but it would be light and easy to carry on the train! Just don't ride it over the tracks when you get off the train...

http://www.treehugger.com/bikes/-bike-electric-smallest-lightest-folding-e-bike-ever.html