Cargo bikes outperform cars, but they are expensive. You can build a Danish XYZ cargo bike by yourself. The fully modular system is so simple that you don’t need complex or expensive tools. The two-wheeled vehicle can carry 90 kg of cargo, the tricycle can carry 150 kg, the four-wheeled one – 300 kg. All models can be equipped with electric hub motors and batteries. The assembled versions are sold for about half the price of similar cargo cycles on…