Cycling is a great way to reduce pollution, stay fit, and travel. But long distances and steep hills often impede on people’s desire to cycle.

The brand new Copenhagen Wheel changes all that.

Instead of requiring the purchase of an expensive hybrid-electric bicycle, the new Copenhagen Wheel simply replaces the rear wheel of your bike.

Just run the special app on your smartphone, and the small battery housed in the wheel saves energy when you are coasting or braking, and gives you a boost of power with its tiny motor when you are travelling uphill.