Pedal Assist Sensor PAS — Female Connector

The Pedal Assist Sensor PAS is a 7mm cadence-sensing ebike pedal assist sensor with female connector, designed for hub motor and mid-drive electric bike conversion kits. This PAS sensor ebike detects pedalling speed via a toothed magnet ring and activates motor assistance smoothly and proportionally. Compatible with the full range of All4eBikes conversion kits and controllers. An essential cadence sensor electric bike component for any DIY build or worn-unit replacement. Simple to install, reliable in use.

Natural, Intuitive Assist — What a PAS Sensor Does and Why It Matters

A pedal assist electric bike feels fundamentally different to ride than one controlled by throttle alone. With a Pedal Assist Sensor PAS fitted, the motor activates automatically when you begin pedalling and cuts off when you stop — producing a riding experience that feels natural and effortless rather than mechanical and deliberate. The effort of riding is reduced precisely when and as much as you are pedalling, making the converted bicycle behave like a responsive, intelligent partner rather than a powered vehicle you happen to pedal.

This is why the PAS sensor ebike is a standard component in every serious electric bike conversion build. It transforms the riding experience from simple throttle-on-throttle-off motor operation into genuine pedal-assisted cycling — the experience that defines what an electric bike actually is at its best. Without a cadence sensor electric bike system, the motor only activates when the throttle is opened manually, requiring constant rider input and removing the intuitive, flowing feel that makes electric bikes genuinely enjoyable for commuting, touring and fitness riding alike.

7mm Magnet Ring — Smooth, Responsive Cadence Detection

The Pedal Assist Sensor PAS uses a toothed magnet ring mounted to the bottom bracket area, combined with a hall-effect sensor positioned 7mm from the ring surface. As the cranks rotate, the magnet ring passes in front of the sensor, generating a pulse signal with each tooth that the controller reads as cadence data. The more pulses per second the controller receives, the faster you are pedalling — and the controller modulates motor output accordingly to deliver smooth, proportional assistance that tracks your actual pedalling rhythm rather than simply switching on at a fixed threshold.

The 7mm sensor gap specification is important for reliable operation. Too large a gap reduces signal strength and can cause missed pulses and inconsistent assist behaviour. The pre-set 7mm gap of this ebike pedal assist sensor is correctly calibrated for the hall-effect sensor used, ensuring consistent signal quality throughout the sensor’s service life without requiring adjustment after installation.

Female Connector — Direct Compatibility with Conversion Kit Wiring

The PAS female connector on this sensor mates directly with the male PAS connector on the wiring harnesses supplied with All4eBikes hub motor conversion kits and controllers — making it a true plug-and-play replacement or addition with no soldering, crimping or wiring modification required. For builders adding pedal assist electric bike functionality to a throttle-only build, or replacing a failed sensor on an existing conversion, installation takes minutes.

Order the Pedal Assist Sensor PAS today — the essential ebike pedal assist sensor that transforms any electric bike conversion from basic throttle operation into the smooth, natural pedal assist electric bike experience every rider deserves.