The 20in Hyper Ultra 40 Electric Bike with step through aluminum frame gets you around in style. This Electric Pedal Assisted Bicycle offers a fun alternative to the ordinary. It features an integrated flush-mount battery. The 20in x 4in multi-surface fat tires add traction and comfort when riding trails or the bike path. With a battery charge time of four hours you will be ready to ride with the electric pedal assist power up to 20 miles.