What is pedal assistance on an e-bike?

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

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

• What exactly does it do?
• How does it work?
• And most importantly: How is this function implemented on different e-bikes?

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

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 power the electric motor should provide. The motor then activates and assists your pedaling.

Most e-bikes allow you to adjust the level of assistance. This way, you can tailor the support 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 traditional bicycle. Pedal assist is a way to maintain the functionality of a regular bike while making cycling more accessible.

With assistance, you don’t have to exert as much effort to cover the same distance. This is especially beneficial for people with limited physical ability, such as older adults or those recovering from an injury.

But pedal assist is also helpful in other situations. It allows you to sweat less and save energy. Need to bike to work but don’t want to arrive exhausted? Activate pedal assist—the electric motor takes on part of the work for you.

Types of pedal assist systems

The two main types of pedal assist on e-bikes are cadence sensors and torque sensors. Both provide assistance but implement it differently.

Cadence sensor

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

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

Torque sensor

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

Because the torque sensor mimics your pedaling force, it offers a more natural and seamless power transfer. Many riders find this riding experience more enjoyable than that of a cadence sensor.

Benefits of pedal assist

Pedal assist offers many advantages:

• Easier riding: You don’t have to do all the work yourself; the electric motor takes on part of it.
• Longer distances: You can ride farther with less effort.
• Off-road capability: On rough terrain like gravel, snow, or sand, the assistance helps you overcome obstacles and climbs more easily.
• Promotes an active lifestyle: For many people, riding a traditional bike is difficult due to physical limitations. E-bikes with pedal assist make it possible to stay active despite these challenges.

Choosing the right assistance level

Each PAS system offers different assistance levels. The higher the level, the more support you get. Most systems have 3 to 5 levels, with some advanced models offering up to 7.

Choose the appropriate level based on your situation:

• Flat terrain: A low level (1–2) is usually sufficient.
• Steep climbs: Higher levels provide more support 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 misunderstandings 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, according to European Union regulations, e-bikes must not exceed a maximum speed of 25 km/h.
• “You can’t 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 greatly enhance your riding experience. It allows for faster and longer rides than a traditional bike and makes steep climbs much easier.

Discover the full range of Heybike products now. Our e-bikes combine comfort and versatility, giving you the freedom to choose a model that perfectly fits your needs.