
The brand-new Hummingbird Flax foldable e-bike weighs even less than all these. This plant-based e-bike weighs only 10 kilograms. The Flax, according to Hummingbird, is the world's lightest foldable electric bike. However, it's not only physically light, but also light to the environment, too. Well, at least according to Hummingbird. That claim is, for the most part, attributable to its inventive frame design.