SINET™ Left-Side Cadence Pedal Assist Sensor with 12-Magnet Disc

The E-BikeKit SINET™ Left-Side Cadence Pedal Assist Sensor activates pedal assistance by detecting crank rotation through a 12-magnet split disc installed on the left side of the crank.

This external sensor mounts to the frame with zip ties and works with current E-BikeKit SINET™ systems to provide simple, reliable cadence-based pedal assist.

• External left-side pedal-assist sensor
• Includes 12-magnet split disc
• Detects crank rotation to activate pedal assistance
• Sensor mounts externally with zip ties
• Split disc installs on the left side of the crank
• Recommended sensor gap: approximately 2 mm or less
• Designed for current E-BikeKit SINET™ systems
• No bottom bracket removal or frame drilling required for most installations

Important Compatibility Notice: This sensor is designed for current SINET™ electrical systems. It is not compatible with Legacy E-BikeKit pedal-assist wiring, Legacy controllers, Rescue Pack systems, or third-party electrical systems unless compatibility has specifically been confirmed.

The 12-magnet disc rotates with the crank. As the magnets pass the external sensor, the sensor sends a signal to the SINET™ controller confirming that the rider is pedaling.

Once the required crank movement is detected, the controller provides motor assistance according to the pedal-assist level selected on the LCD.

• Pedaling rotation activates assistance
• Stopping the crank stops the pedal-assist signal
• The selected LCD assist level determines programmed motor output
• The sensor does not measure how hard the rider is pedaling

Compared with a bottom bracket torque sensor, cadence sensing is generally simpler to install but does not provide proportional assistance based on rider effort.

• Installation Side: Left side of crank
• Sensor Mounting: External frame mounting with zip ties
• Magnet Disc: 12-magnet split disc
• Disc Installation: Left side of crank
• Recommended Sensor Gap: Approximately 2 mm or less
• Electrical Platform: Current E-BikeKit SINET™ system
• Crank Clearance: Sufficient space for the disc to rotate without contact
• Frame Clearance: Suitable mounting location close enough to the magnet disc

Important: Confirm there is adequate clearance between the left crankarm, bottom bracket area, frame, sensor, and magnet disc before installation.

Compatible With:

• Current E-BikeKit SINET™ conversion systems
• Current E-BikeKit SINET™ complete trike systems
• SINET™ integrated-controller systems
• SINET™ external-controller systems
• Compatible bicycles and trikes with sufficient left-side crank and frame clearance

Not Compatible With:

• Legacy E-BikeKit pedal-assist systems
• Legacy E-BikeKit controllers or wiring harnesses
• SINET™ bottom bracket torque-sensor connections
• Third-party electrical systems unless compatibility has been confirmed
• Installations without adequate clearance for the sensor and magnet disc

Matching connector appearance alone does not confirm compatibility. Verify the complete electrical platform before ordering.

• Brand: E-BikeKit
• Platform: SINET™
• Product Type: External cadence pedal-assist sensor
• Installation Side: Left
• Sensor Mounting: External frame mounting with zip ties
• Magnet Disc: 12-magnet split disc
• Disc Installation: Left side of crank
• Recommended Sensor Gap: Approximately 2 mm or less
• Pedal-Assist Function: Crank-rotation detection
• Torque Measurement: No
• Frame Drilling Required: No, under normal installation conditions
• Variants: None

• One SINET™ left-side external cadence sensor
• One 12-magnet split pedal-assist disc
• Installation zip ties

Not Included:

• Crankarms
• Crankset
• Controller
• LCD
• Wiring harness
• Bottom bracket torque sensor

• Disconnect and remove the battery before beginning installation
• Install the 12-magnet split disc on the left side of the crank
• Verify the disc is fully seated, centered, and rotates without contact
• Mount the external sensor securely to the frame using the included zip ties
• Position the sensing face toward the magnets
• Maintain a gap of approximately 2 mm or less between sensor and disc
• Confirm the magnet disc passes through the active sensing area during crank rotation
• Route the cable away from crankarms, chainrings, chains, steering components, tires, and sharp edges
• Align connector arrows and pins before joining the plugs
• Do not twist or force the connectors
• Rotate the crank by hand and confirm the disc and sensor do not contact each other
• Test pedal-assist engagement and cutoff before riding

Adjustment Note: If pedal assist does not activate consistently, first verify sensor direction, magnet-disc orientation, alignment, and the distance between the sensor and disc.

The cadence sensor and bottom bracket torque sensor provide two different pedal-assist experiences.

• Cadence Sensor: Detects crank rotation and activates the programmed assistance assigned to the selected pedal-assist level.
• Torque Sensor: Measures rider effort and adjusts assistance proportionally to pedaling force.

The external cadence sensor is generally simpler to install because it does not require bottom bracket replacement or drilling a cable-routing hole in the frame.

Not sure whether this cadence sensor will fit your bike or trike? Contact us before ordering and we can help review the crank and frame clearance.

Clear photos of the left-side crank and bottom bracket area are especially helpful.

Questions? Call us toll-free at 1-866-882-3245, Monday–Friday, 9am–5pm ET, or email support@ebikekit.com.