Mountain e-bike tire pressure: The myth of higher pressures and the benefits of lower values

How to choose the right tire pressure for mountain e-bikes

One of the most important aspects of riding a mountain e-bike comfortably and efficiently is the correct tire pressure. Many riders tend to believe that higher tire pressure provides less drag and therefore better performance. However, this reasoning is partly wrong, especially when it comes to riding on terrain such as gravel, mud or rocky roads.

Higher Pressure: The Myth of Less Resistance

Higher tire pressure can actually offer lower rolling resistance on smooth asphalt or hard surfaces, which may seem like an advantage when you're riding fast on the road. However, in off-road conditions, where the terrain is less predictable, this approach does not lead to better performance. Higher tire pressure means that the tire is unable to adequately adapt its properties to various irregularities. In gravel, mud or rocky roads, the tire will not have enough grip on the surface, which leads to loss of control and increased rider fatigue. A tire with a higher pressure will not "spring" and absorb impacts effectively, which will make riding more difficult and may even damage the bike.

Lower pressure: Comfort and stability

Conversely, lower tire pressure offers many benefits that are essential when riding on rougher terrain. When the pressure is reduced, the tire expands and "wraps" the terrain better, providing better traction. On gravel or muddy surfaces, the bike will be able to transfer power to the ground better, keeping you stable and making it easier to avoid slipping or sinking.

Another benefit of lower pressure is greater comfort for the rider. Lower pressure is better at dampening the vibrations that are normally transmitted through the bike frame when riding over bumps. This effect can significantly reduce rider fatigue, as the reduced transmission of vibrations results in less strain on the body, especially on the hands, wrists and shoulders. This is especially useful during longer rides in difficult terrain.

Tubeless systems: Even lower pressure possible

Tubeless systems are becoming an increasingly popular choice for e-mountain bike riders. These systems, which do not require a tube, allow for even lower tire pressures than traditional tube tires without increasing the risk of a puncture. Tubeless eliminates the need for an inner tube, reducing the weight of the bike and providing better puncture protection. In addition, tubeless technology allows riders to ride at pressures up to 0.2-0.3 bar lower than traditional tube tires, providing even greater comfort and better grip on soft terrain such as mud or sand.

The tubeless system also allows the use of special sealants that can seal small punctures in the tire, significantly reducing the likelihood of a puncture. This approach is especially beneficial for long rides in difficult terrain where traditional tubes would easily be damaged. The pressure that can be used in this case is significantly lower, ensuring better comfort and stability without the fear of frequent punctures.

What pressure to choose?

The optimal pressure depends on several factors, including the type of terrain, rider weight and the bike itself. In general, for e-mountain bikes, it is recommended to stay between 1.8 and 2.5 bar, with higher pressures being recommended for hard surface riding and lower for off-road conditions. With tubeless systems, you can safely use slightly lower pressures, which will improve traction and comfort. It is important to check your tire pressure regularly, as changes in temperature, rider weight or tire wear can affect tire performance.

Conclusion

Higher tire pressure does not always mean an advantage when riding in terrain where tires are exposed to more demanding conditions. Conversely, lower pressure provides better grip, greater comfort and stability, which is essential for an optimal riding experience. Tubeless offers the possibility of riding with even lower pressures while increasing protection against punctures. It is important to find a balance between performance and comfort and choose the right pressure depending on the conditions in which you will be riding.

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