Choosing a new bike is not easy, especially with all the options available on the market today. On one hand, we have electric fatbikes, behemoths capable of riding on sand, snow, or muddy trails with ease. On the other hand, we have electric mountain bikes that accompany adventurers on their mountain escapades or on technical trails.
Faced with this double proposition, it can be difficult to choose a particular model. But then, how to make your choice? We made a comparison between electric fatbikes and electric mountain bikes.
Technical characteristics of electric fatbikes and electric mountain bikes
Electric fat bikes and electric mountain bikes have unique technical characteristics. From tire design to motor type, each element plays a central role in their performance. Let's take a look at the elements that differentiate these two types of electric bikes.

Tire width
The silhouette of electric fatbikes is easily recognizable. It must be said that their oversized tires, ranging from 4 to 5 inches, do not go unnoticed. With these, this large wheel electric bike benefits from excellent grip on all types of surfaces: sand, snow, mud, mountains. Thanks to their large contact surface, electric fatbikes can go on any trail. However, the same cannot really be said for electric mountain bikes.
Electric mountain bikes, on the other hand, are equipped with thinner tires, about 2 to 3 inches wide. This more modest size boosts the maneuverability of the machine, but proves to be impractical on more demanding terrains. In contrast, where it excels is on narrow or mountain paths. It provides better agility in tight turns and allows one to navigate very complex routes.
Weight and maneuverability
For a bicycle, weight is a criterion that is of utmost importance. It directly affects its performance and handling.
With their weight of 20 to 30 kg, electric fatbikes are particularly heavy vehicles. This excess weight is explained by the reinforced structure of their frame and the width of their tires. Because of this, you may find it more difficult to handle the fatbike, especially in climbs and tight turns. However, there are some advantages, such as enhancing stability on bumpy paths.
As for electric mountain bikes, they weigh between 19 and 35 kg. The weight can vary depending on the materials used (aluminum, carbon, etc.) and the power of the battery. Lighter than fat bikes, electric mountain bikes are therefore more maneuverable. A significant advantage when quick direction changes are necessary.
Motor and electric assistance
In terms of motorization, electric fat bikes and electric mountain bikes are distinguished by the position and power of their motor. The motor can be placed on the rear wheel, the front wheel, or at the center of the bottom bracket. The central position (on the bottom bracket) is often preferred. It offers a balanced weight distribution, thereby improving stability and traction.
In terms of power, the European Union has established a standard aimed at limiting motors to 250W. This ensures safe use of devices on public roads. However, some fatbikes can reach powers of 750W to 1000W. These are generally intended for off-road use and therefore require more power to tackle difficult paths.
With electric mountain bikes, the focus is more on efficiency and electric assistance. Their low power is compensated by an optimized motor capable of climbing the steepest slopes.
The performance and adaptability to the terrain
Whether on snow, sand, or mountain trails, the performance of fat bikes and electric mountain bikes varies significantly. This criterion is crucial for choosing the bike that best suits your needs. Let's explore the strengths and limitations of each model.

The types of suitable terrains
The electric fatbike is designed to tackle rough terrain. With its extra-wide tires, this big wheel electric bike benefits from incredible grip on soft surfaces like sand or snow. Its large contact area with the ground allows it to ride where other bikes would struggle.
The electric mountain bike is used on mountain trails and technical terrain. Its lightweight and agile design, combined with thinner tires, allows it to better navigate tight turns.
Autonomy
In terms of autonomy, electric fatbikes are very well-equipped. With their batteries ranging from 500 to 1,000Wh, they enjoy an average range of 50 to 120 km, depending on the conditions of use. However, due to the significant weight of their tires and frame, they consume more energy. So, always keep an eye on the battery gauge.
Electric mountain bikes are equipped with batteries ranging from 400 to 825 Wh. A lower power, but which still provides a similar range to fatbikes. Their advantage: they are lighter, which optimizes energy consumption. This small detail is very important for cyclists planning long rides in the mountains.


Cost and maintenance
The purchase price is not everything in the choice between an electric fatbike or an electric mountain bike. It is also important to consider the maintenance needs, which vary from one model to another. Discover their differences and identify the most cost-effective bike in the long run.

The initial cost and value for money
Now, let's talk about prices. The electric fatbike costs between €1,800 and €3,000. A high initial cost that can be explained by the quality of its components: the XXL tires, the motor power, and the battery capacity. In comparison, the electric mountain bike is significantly more affordable. The purchase price of entry-level models starts at €2,000. High-end models can reach €5,000.
In terms of value for money, ROCKRIDER electric mountain bikes often serve as a benchmark in the market. This brand offers quality models at a competitive price, making it an interesting choice for beginners and casual cyclists. However, if you are more inclined towards electric fatbikes, we highly recommend the Garrett Miller brand. Although more expensive, the models from this brand are better equipped and offer better long-term performance.
Maintenance needs
You will certainly be surprised to learn that electric fatbikes are easier to maintain than electric mountain bikes. This is due to their wider and more robust tires, which are less prone to punctures and wear. Additionally, their minimalist frame greatly reduces maintenance needs.
Conversely, electric mountain bikes must be regularly maintained, especially regarding the brakes and the drivetrain. The Shimano transmission systems used on some models require frequent adjustments to maintain optimal performance.
Accessibility and usability for beginners
Choosing a suitable electric bike for your level can be a real headache, especially if you are new to the world of mountain biking or fatbiking. The bike's maneuverability, weight, and responsiveness play a crucial role in comfort and safety, especially for those who do not yet have much experience.
Electric fatbikes
Electric fatbikes are particularly stable, which is a real asset for riding on difficult terrains like snow or sand. However, their relatively high weight and the width of their tires can make them a bit tricky to handle, especially for beginner cyclists. If you don't have much experience in mountain biking, you might find it difficult to maneuver a fatbike on technical trails or in tight turns. Therefore, it is best to get familiar with this type of bike on simpler terrains before venturing onto more demanding courses.

Electric mountain bikes
On their side, electric mountain bikes are often more suitable for beginners. Thanks to their lightness and agility, they are easier to control, even on varied but less technical terrains. For novices, it may be wise to choose a model with a less powerful motor and a lighter frame, which allows for better effort management and easier progression. In general, electric mountain bikes are perfect for those who want to start off-road without feeling overwhelmed by overly imposing equipment.
Fatbike and electric mountain bike on the road: what does the law say?
Before heading out on the road with your electric fatbike or electric mountain bike, you need to know the rules governing their use. Electric bikes, like any other vehicle, are subject to specific regulations that vary depending on local legislation, particularly regarding the maximum speed allowed and the areas where they can operate. Here is an overview of the main legislative aspects to consider for riding legally.
Speed limits
In Europe, European regulations limit the speed of electric bicycles to 25 km/h on public roads. This applies to all models, whether they are electric mountain bikes or electric fatbikes. This limit aims to ensure safe use on the road, avoiding the risks associated with excessive speed. Once this speed is reached, the motor no longer provides assistance. In other words, physical effort remains essential to continue riding faster. If you exceed this limit, your bike will be considered a moped, which implies stricter regulations (insurance, registration, etc.).

Types of permitted land
Regarding the terrains on which you can ride, the rules also vary. Electric mountain bikes and electric fatbikes are generally allowed on bike paths and public roads. However, some trails or private paths may be prohibited for electric bikes, especially in protected areas such as natural parks, reserves, or classified forests. Fatbikes, in particular, being often used on more specific terrains (beaches, snow, mud), should be used with caution to avoid any violations.
Verification of local regulations
Rules can also vary from one region to another. For example, some municipalities or departments may impose additional restrictions regarding access to natural areas or impose special rules for electric fatbikes, which, due to their size and potential impact on the terrain, may be subject to stricter restrictions than electric mountain bikes. Therefore, before heading out for a ride, it is advisable to check local regulations to avoid any unpleasant surprises and to ride legally.
A little reminder about the important points
"Your choice will therefore depend on the use you plan to make of it. Each type of bike has its strengths and weaknesses that you must know in order to make the best choice. So a fat bike or a mountain bike? Here is a small summary table of the points we have discussed in this article:"
Criteria |
Electric Fatbikes |
Electric Mountain Bikes |
Tires |
Wider (4-5 inches), providing better traction |
Narrower (2-3 inches), suitable for technical trails |
Weight |
Generally heavier (15-25 kg) |
Varies from 19 to 35 kg depending on the model |
Tire pressure |
Low (0.3-1 bar), promoting grip on soft surfaces |
Higher (1.5-2.5 bars), suitable for hard surfaces |
Usage Area |
All-terrain: sand, snow, mud, and rough terrain |
Suitable for trails, mountain paths, and asphalt |
Driving Comfort |
Very comfortable on uneven paths |
Not very comfortable on very rough terrain |
Handling |
Difficult to handle due to the weight and width of the tires |
Very maneuverable, especially on technical sections. |
Autonomy |
Superior thanks to high-capacity batteries |
Variable autonomy, but generally sufficient for long hikes. |
Cost |
High price justified by innovative technology and quality materials |
Varies considerably, but high-end models can be expensive. |
Daily Use |
Less suitable for daily use in an urban environment |
Can be used daily, but preferably for sports. |
Electrical Assistance |
Powerful motors (up to 750W) for optimal electric assistance |
Motors limited to 250W according to European regulations |
Conclusion
In summary, the choice between an electric fatbike and an electric mountain bike entirely depends on your needs and the terrains you plan to ride on.
The electric fatbike is the king of difficult terrains. Thanks to its wide tires and stability, it easily navigates through snow, sand, and mud. Sturdy and comfortable, it is the ideal choice for those seeking adventures off the beaten path.
On their side, electric mountain bikes shine with their versatility. Agile and lightweight, they allow for riding both in the city and on mountain trails. Their dynamic design, combined with excellent maneuverability, makes them the perfect choice for those seeking both performance and practicality.