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In this article, we want to explain what the PAS system is — the electric bike pedal assist system. We’ll explore why Delfast incorporates it into our e-bikes and whether it’s truly necessary.
An electric bike is a hybrid vehicle. If it relied only on human power, it would be just a regular bicycle, and if it used only the motor, it would function more like an electric scooter. The introduction of motors in bikes was initially driven by their limited power and reliability. At that time, pedals were essential for two main reasons: when the motor failed and the rider needed to reach their destination, or when the motor lacked enough power to climb hills.
Over time, motors became more powerful and reliable, making pedals seem redundant. However, the combination of both systems led to inefficiency. As motors grew stronger, they required more weight, while the need for lighter bikes increased. This evolution marked the shift from traditional bikes with motors to modern electric bicycles, which are now seen as smart devices on wheels.
Today, electric bikes can operate in different modes. While many use a throttle, some feature a Pedal Assist System (PAS). This system activates the motor based on the rider’s pedaling, offering a smoother and more natural riding experience. It helps the rider conserve energy and extend the battery life, making the ride more efficient.
In Europe, PAS systems are mandatory to ensure safety and integration into existing bike infrastructure. There are various types of PAS systems available. Some use simple sensors that detect pedal rotation, while others use torque sensors to measure the force applied by the rider. These advanced systems provide more accurate assistance, allowing the motor to respond proportionally to the cyclist’s effort.
For riders who rely heavily on pedal power, torque-based PAS systems are ideal. They offer seamless assistance without the need for constant throttle input. These systems are commonly found on mountain e-bikes designed for standard bike paths, where the goal is to provide subtle support rather than full power.
The choice of PAS system depends on the rider’s needs and preferences. Some prefer a throttle-only setup, while others appreciate the synergy between their own effort and the motor’s assistance. Ultimately, the presence of a PAS system enhances the overall performance and efficiency of an e-bike, making it a valuable feature for many users.
At Delfast, we believe in creating e-bikes that are not only powerful but also intelligent and user-friendly. That’s why we integrate pedal assist systems into our designs, ensuring a balanced and sustainable riding experience.