spoke magnet

A spoke magnet is a small component that is attached to the spoke of a bicycle and is primarily used in combination with bicycle computers or e-bike displays to measure speed and cadence .

How it works

The spoke magnet works according to the magnetic principle :

• It is attached to a spoke near the wheel hub.

• A sensor, usually mounted on the fork or rear stays, detects the passing magnetic field.

• Each passage of the magnet triggers a signal that the bicycle computer converts into speed, distance or cadence .

This system was particularly common in classic bicycle computers and simple e-bike systems before wireless sensors became common.

Areas of application

• Bicycle computer : For accurate recording of speed, distance and ride time

• E-bike systems: For determining wheel speed for motor control

• Training: For precise measurement of cadence on training bikes

Advantages

• Simple and reliable: Mechanical magnets are robust and require little maintenance.

• Affordable: Cost-effective solution for bicycle computers and sensors

• Easy installation: Can be attached to spokes without special tools.

Disadvantages

• Mechanical wear: The magnet or sensor can come loose if improperly installed.

• Accuracy depends on sensor position: Incorrect alignment can lead to measurement errors.

• Visually noticeable: Not as inconspicuous as integrated sensors

Safety instructions

• Spoke magnets should be firmly attached to prevent them from slipping or falling off during the ride.

• The sensor and magnet must be correctly aligned to ensure reliable readings.