A motor, a battery, and some wheels: It might look like cheating or a sign of laziness to a purist, but these electric bikes make a strong case for a motor assist. With a few hours of charging, you can accelerate quicker, ride hills with less effort, or just ride farther. Also, they're a lot of fun. From pedal-assisting designs to throttle models, we put tons to the test and picked ten of our favorites to take for a spin.
Surly Pugsley with BionX Motor
Surly's Pugsley is already one of the great fat bikes, a kind of mountain bike with oversized tires for extreme off-road riding. Surly slapped a BionX motor on the Pugsley to make a machine that can roll over just about anything — sand, snow, or mud. With the motor set on pedal assist, riding this bike through golf-ball-size gravel was no problem. And going uphill on asphalt — where the massive, nobby off-road tires don't usually excel — was a breeze with the motor running at full-tilt.
[$3,800; surlybikes.com; ridebionx.com]