The Copenhagen Wheel Makes Your Bike Electric, And It’s About To Go On Sale In 2009, MIT researchers wowed the world with a way to electrify any old bicycle. Now, it's finally a product you can buy.

The FZ-S Fi Hybrid gets a 282mm disc brake at the front and 220mm disc at the rear, with single-channel ABS as standard. The bike rolls on 17-inch alloy wheels which are wrapped in 100-section ...