Discover the best pedal assist (PAS) systems for electric bikes available on the UK market. This guide highlights reliable PAS sensors that integrate with common hub motors and crank configurations, helping you choose components that deliver smooth power, precise torque sensing, and easy installation.
| Product | Brand | Key Benefit | Typical Use |
|---|---|---|---|
| Hsthe Sea Electric Bike Pedal Assist Sensor | Hsthe Sea | Easy clamp-on installation, reliable performance | |
| ECSiNG KT V12L Pedal Assist Sensor | ECSiNG | Left-crank installation, ultra-thin design | Left-side PAS integration |
| Varstrom 12-Magnet PAS for Bafang | Varstrom | 1:1 power ratio, 12 magnets for accuracy | Bafang hub motors |
| Dioche 12-Magnet PAS Sensor | Dioche | Forward/reverse sensing, robust build | General PAS for bikes |
| FAMEX RIDE E-Bike PAS – THIN | FAMEX RIDE | Waterproof, easy to fit | Wetter conditions, simple fit |
Hsthe Sea PAS Sensor
The Hsthe Sea pedal assist sensor is designed for road and mountain bikes, featuring 12 built-in magnets and a 1 m (3.3 ft) cable. It uses a three-wire system (red 5V, green signal, black ground) for straightforward wiring. Installation is simplified by clamping the inner ring on the intermediate shaft and fixing the outer shell to the frame, eliminating the need to disassemble components. Constructed from durable ABS, it offers reliable operation and resistance to wear in typical riding conditions.
ECSiNG KT V12L PAS Sensor
The ECSiNG KT V12L pedal assist sensor is designed for left-crank installation with a compact, low-profile profile at just 6.8 mm thick. It’s crafted from durable plastic for longevity and easy wear resistance. The left-side mounting and simple attachment to the bike’s axis allow for a tidy setup, minimising disruption to the crank area while preserving functionality.
Varstrom 12-Magnet PAS for Bafang
Varstrom’s PAS sensor for Bafang hub motors uses 12 magnets and dual magnetic ring Hall effect technology to deliver precise torque sensing and a responsive 1:1 power ratio. The sensor detects pedal movement on the chainring and sends a DC signal to the controller, enabling smooth power delivery and enhanced ride quality for riders using Bafang motor systems.
Dioche 12-Magnet PAS Sensor
Dioche’s PAS sensor employs 12 magnets across a dual-magnetic loop to capture pedal torque with a single Hall sensor. It detects pedal forward movement to activate the electric drive, simplifying integration with various e-bike configurations. The product emphasises reliability and straightforward electrical connections for effective performance in daily cycling.
FAMEX RIDE E-Bike PAS – THIN
The FAMEX RIDE THIN PAS sensor is built to be waterproof and easy to fit, featuring a slim profile that blends with modern e-bikes. Its design aims to deliver consistent pedal-assisted power even in damp conditions, making it a practical option for UK weather and varied riding environments.
JTLB PAS Sensor With 8 Magnets
JTLB’s pedal assist sensor uses eight magnets and is designed to detect forward pedal rotation, activating the motor to provide assistance. The device is made from PC material for durability and impact resistance, with strong waterproof performance suitable for outdoor riding, making it a versatile choice for many e-bike setups.
Buying Guide: Key Considerations for Selecting a Pedal Assist Sensor
- Motor compatibility: Confirm whether the PAS sensor is designed for hub motors (like Bafang) or crank-based systems, and ensure electrical compatibility with your controller and battery.
- Magnet count and resolution: More magnets generally improve torque detection accuracy, leading to smoother power delivery, especially on varying terrains.
- Installation options: Look for sensors that match your frame and crank arrangement—left-crank mounting, clamp-on intermediate shaft designs, or thin profiles for discreet fitting.
- Durability and weather resistance: Waterproof or weather-sealed units are preferable for UK weather and frequent outdoor use.
- Wiring and plug types: Check the wire length and connector compatibility with your existing setup to avoid length issues or mismatched connectors.
- Response and calibration: Some sensors provide quicker response times; verify whether you can calibrate or adjust sensitivity to suit your riding style.
- Maintenance and serviceability: Choose sensors with durable housings and easy-to-replace parts, reducing long-term maintenance.
- Affordability and support: Compare price points and vendor support, including return policies and firmware updates that may enhance performance.