The Bionx D500 Paratrooper Pro is a military-grade electric mountain bike that folds for easy transport, and the whole thing weighs only 48.2 lbs. A 48V, 11.6 Ah Lithium-Ion battery pack is mounted down low on the frame, providing the perfect center of gravity for balanced riding in the dirt or on the pavement. The Electric Cyclery Biontague Pro 500 …
