What is a FAT eBike?
A fat tire electric bike (often called a FAT e-Bike) is essentially a standard electric bike (e-Bike) with oversized, balloon-like tires. These tires are typically 3 to 5 inches wide. Here’s what makes them unique:
Extra-Wide Tires: FAT e-Bikes feature large, soft tires that provide extra traction and shock absorption. These tires allow riders to comfortably navigate various terrains, including rocky trails, sandy beaches, like we have in Florence.
Comfort and Rollover Capability: The high-volume tires allow you to run low tire pressures, resulting in a more comfortable ride. Unlike traditional bikes, where you might inflate tires to higher pressures, fat e-bikes can be ridden with as little as 5 to 10 psi in the tires.
Versatility: Fat tire e-bikes are not limited to off-road adventures. They are also suitable for city streets. Although versatal,you probbiably will not be riding them super long distances.
In summary, a fat tire electric bike combines the best features of fat bikes (known for their wide tires) and electric bikes (powered by an electric motor), providing a smooth and capable ride across various surfaces. Whether you’re exploring rugged trails or cruising through a city, a FAT e-bike offers a unique riding experience! 
Rules, Regulations and useful information on the use of eBikes
Additional 
Thanks to Aventon eBikes