Torque sensor vs. cadence sensor on an e-bike

In the field of electric bicycles, the debate between torque and cadence sensors is one of the most hotly discussed topics.

Both types of sensors provide a form of pedal assistance, but they differ in how they work. This results in different riding experiences, making it crucial to choose the sensor that best suits your personal preferences and physical condition.

In this article, we explain the differences between torque and cadence sensors and discuss their advantages and disadvantages.

What Are E-Bike Sensors?

An e-bike sensor measures when pressure is applied to the pedals. As soon as you pedal, the sensor detects the rotational movement and sends this information to the controller.

The controller then instructs the electric motor to switch on and assist the wheels. This transition happens very quickly and continues until you stop pedaling. The two most commonly used sensor types on e-bikes are cadence and torque sensors.

What Is a Torque Sensor on an E-Bike?

A torque sensor measures when and how much pressure is applied to the pedals. Pedal assistance is proportional to the force you apply while pedaling.

What does this mean for you? The harder you pedal, the more intensely the electric motor works to help you accelerate and maintain your speed. When you reduce your pedaling force, the controller reduces the assistance accordingly.

Most e-bikes have different assistance modes. These allow you to adjust the strength of the motor assistance. In “Eco” mode, for example, assistance might be increased by 50%, while a higher mode could amplify your pedaling force by 100%.

Advantages of a Torque Sensor

The main advantages of a torque sensor are:

• More precise pedal assistance for greater range
• A natural pedaling feel with minimal delay between pedal movement and motor assistance
• Improved safety and stability in challenging conditions

Disadvantages of a Torque Sensor

The disadvantages of a torque sensor are:

• Requires more pedaling effort compared with a cadence sensor
• Often installed on more expensive e-bikes
• May cause slight jolting or braking when assistance is reduced

What Is a Cadence Sensor on an E-Bike?

Unlike a torque sensor, which measures how hard you pedal, a cadence sensor only detects when you pedal. As soon as you pedal, the controller activates the motor to assist the wheels.

How Does a Cadence Sensor Work?
The system consists of a sensor and several magnets. The sensor is mounted near the bottom bracket on the bicycle frame, while the magnets are attached to a disc on the crank arm.

When you operate the pedals, the magnets move past the sensor. This allows the sensor to measure the movement and send the information to the controller. The number of magnets – typically between 3 and 14 – determines how precisely the assistance works.

Advantages of a Cadence Sensor

The main advantages of a cadence sensor are:

• Less expensive to purchase and maintain compared with torque sensors
• Enables faster acceleration with less pedaling effort
• Often installed on more affordable e-bikes

Disadvantages of a Cadence Sensor

The disadvantages of a cadence sensor are:

• Delay between pedal movement and motor activation
• Shorter range compared with torque sensors
• May cause sudden acceleration when changing modes

Torque Sensor vs. Cadence Sensor: The Key Differences

Torque and cadence sensors both provide good assistance while pedaling, but they differ in how they work. The choice of sensor type has a significant impact on the riding experience.

Here are the key differences:

• Riding experience: Torque sensors provide a smoother riding experience because they respond more precisely to pedaling force and transfer power seamlessly from the pedals to the motor.
• Energy efficiency: Torque sensors offer greater range because the motor only provides assistance when you are actually pedaling, helping conserve battery life.
• Terrain suitability: On steep climbs and uneven terrain, torque sensors provide a more natural pedaling feel and respond more quickly to changes in pedaling force.
• Cost: Cadence sensors are less expensive because they consist of fewer components and are easier to produce.

Conclusion

Choosing an e-bike that suits your needs can be challenging – especially if you do not know exactly how the individual components work. Technical terms and concepts can make the decision even more difficult.

However, having the right knowledge makes this task easier. If you understand how torque and cadence sensors work, you can make the right decision more easily and know what to expect from each sensor type.

Why not explore your options right away? Discover the entire Heybike product range today. Our commuter e-bikes are designed for maximum comfort and safety – perfect for meeting your lifestyle and needs.