Today, we’re diving into what the PAS system is — the pedal assist system on electric bikes. We’ll explain why Delfast chose to integrate it and whether it’s truly necessary.

Electric bikes are a hybrid between traditional bicycles and motorized vehicles. If they were powered only by human effort, they’d just be regular bikes. If they relied solely on the motor, they’d be electric scooters. The real magic comes from combining both.

Historically, motorized bikes emerged because early motors were weak and unreliable. Pedals were essential in two main scenarios: when the motor failed and riders needed to reach their destination, or when the motor lacked power for tasks like climbing hills. Over time, motors became more powerful and reliable, making pedals seem unnecessary. But that changed with the introduction of smart electronics, turning e-bikes into “smartphones on wheels.”

Modern e-bikes use advanced systems that allow the motor to assist the rider while still letting them pedal. This creates a seamless, energy-efficient ride. That’s why e-bikes are becoming so popular — they offer the best of both worlds.

There are different ways to control an e-bike’s motor. Most use a throttle, but some also use a Pedal Assist System (PAS). PAS detects pedaling motion and activates the motor accordingly. It helps make riding easier and more intuitive, especially on inclines or longer distances.

In Europe, PAS systems are mandatory for e-bikes. This ensures they fit into existing cycling infrastructure and remain safe for all road users. There are various PAS designs, each with its own pros and cons.

One common design uses a sensor and a magnet ring to detect pedal movement. It works by sending a signal to the controller, which then powers the motor. However, this system has limitations — it can’t precisely control speed, and if you stop pedaling, the motor turns off. That’s why many models still include a throttle as a backup.

For riders who rely mostly on pedaling, torque-based PAS systems are better. These measure the force applied to the pedals and adjust motor assistance accordingly. Brands like Bosch and Shimano have developed high-quality systems that offer smooth, natural support without overloading the battery.

PAS systems not only enhance the riding experience but also help extend battery life. Since the motor doesn’t have to work as hard, it reduces strain and increases efficiency. For manufacturers like Delfast, this means a more sustainable, user-friendly product that meets both practical and legal standards.

In short, the pedal assist system isn’t just a feature — it’s a key part of the future of electric mobility. Whether you're commuting, exploring, or simply looking for a smarter way to move, an e-bike with PAS offers a balanced, efficient, and enjoyable ride.