What is pedal assistance on an e-bike?

When buying an e-bike, you will inevitably come across the term “pedal assist.” This feature is part of the standard equipment of almost every e-bike. It allows you to ride longer with less physical effort compared with a conventional bicycle.

However, the introduction of a pedal assist system (PAS) raises some questions:

• What exactly does it do?
• How does it work?
• And above all: How is this function implemented in different e-bikes?

In this article, you will learn how pedal assist works on an e-bike and what types of pedal assist systems are available.

How Does Pedal Assist Work?

The pedal assist on an e-bike helps you accelerate faster and maintain your speed. Four main components make this possible: the battery, the electric motor, the sensor, and the controller.

When you pedal, the sensor detects the pedal movement. The controller then calculates how much energy the electric motor should provide. The motor is then activated and assists your pedaling.

Most e-bikes allow you to adjust the level of assistance. This enables you to tailor the assistance to your needs. Every model in the Heybike series offers 3 PAS levels, with level 3 providing the strongest assistance and level 1 the least.

Why Do E-Bikes Have Pedal Assist?

The main purpose of an e-bike is to overcome the limitations of a conventional bicycle. Pedal assist is one way to retain the functionality of a regular bicycle while making cycling more accessible.

With assistance, you no longer need to exert as much effort to cover the same distance. This is especially beneficial for people with limited physical abilities, such as older adults or those recovering from an injury.

Pedal assist is also helpful in other situations. It allows you to sweat less and conserve energy. Do you need to cycle to work but do not want to arrive exhausted? Activate pedal assist - the electric motor will do part of the work for you.

Types of Pedal Assist Systems

The two main types of pedal assist on e-bikes are cadence and torque sensors. Both sensors provide assistance, but they do so in different ways.

Cadence Sensor

A cadence sensor measures your pedaling movement. As soon as you start pedaling, the electric motor activates and provides assistance.

With a cadence sensor, the power supplied by the electric motor remains constant, regardless of how hard you pedal. It works like an on-off switch: as soon as you start pedaling, the motor turns on; when you stop, it turns off.

Torque Sensor

A torque sensor is a more advanced version of a cadence sensor. It detects not only when you are pedaling, but also how hard you are pedaling. The harder you pedal, the more assistance the motor provides.

Because the torque sensor responds to your pedaling force, it provides a more natural and seamless power transfer. Many riders find this riding experience more comfortable than that of a cadence sensor.

Benefits of Pedal Assist

Pedal assist offers many benefits:

• Easier Riding: You do not have to do all the work yourself; the electric motor takes over part of it for you.
• Longer Distances: You can ride farther with less effort.
• Off-Road Capability: On challenging terrain such as gravel, snow, or sand, the assistance helps you handle obstacles and inclines more easily.
• Promotes an Active Lifestyle: For many people, riding a conventional bicycle is difficult because of physical limitations. E-bikes with pedal assist make it possible to stay active despite these limitations.

Choosing the Right Assistance Level

Every PAS system offers different assistance levels. The higher the level, the more assistance you receive. Most systems have 3 to 5 levels, while some advanced models offer up to 7.

Choose the appropriate level based on your situation:

• Flat Terrain: A low level (1–2) is often sufficient.
• Steep Climbs: Higher levels provide more assistance, but consume more battery power.

Keep in mind that higher assistance levels drain the battery faster. Use them sparingly to extend battery life.

Common Misconceptions About Pedal Assist

Despite its popularity, there are still misconceptions about e-bike technology:

• “Pedal assist is only for certain groups”: E-bikes are suitable for everyone, regardless of age or ability.
• “Pedal-assist bikes are slow”: Combined with your own pedaling, e-bikes can reach speeds of 32 to 45 km/h (20 to 28 mph). However, under current European Union regulations, e-bikes may not exceed a maximum speed of 25 km/h.
• “You cannot ride them in the rain”: Most e-bikes are water-resistant and suitable for riding in light rain.

Conclusion

When used correctly, pedal assist can significantly improve your riding experience. It allows you to ride faster and farther than with a conventional bicycle and makes steep climbs much easier.

Discover the full Heybike product range today. Our e-bikes combine comfort and versatility, giving you the freedom to choose a model that perfectly suits your needs.