This is one of the questions we get most often at YOUNG ELECTRIC. Not just what is a fat tire electric bike, but what are the benefits of a fat tire ebike? And what are the downsides of this type of ebike over other styles? As described in our Guide to Fat Tire Electric Bike, the defining feature of these bikes is their extra wide tires. Any tire that is 4" wide or more is considered fat. These tires have a wider surface area that is in contact with the ground, and often knobby treads. This provides enhanced traction and stability, especially on rough or unpaved surfaces.
Fat tire bikes provide improved grip and traction, even in some challenging terrains. In off-road settings, a fat tire electric bike really shines. You can smoothly roll over rocks and roots without a problem. And with the help of an electric motor with torque sensors, it is now possible to carve a path through fresh snow or ride your bike on a sandy beach, without being an American Gladiator.
Based on my experience using a fat tire electric bike, it is big, heavy, and more difficult to maneuver. They take a lot more battery power to keep moving, which results in a bike with even more weight and heft.