It's the 3D-printed Titanium Zero, and it sports what is claimed to be the world's smallest, lightest, highest-torque-density motor. Built as a one-off electric road bike concept, the Titanium ...
In the UK and EU, you need a bike with a motor that doesn't exceed 250W of power or 25 kmph. In the U.S. things are easier, and a motor that doesn't exceed 750W will do just fine. Our best ...