Polar Speed Sensor Installation

Select a Suitable Location for Placement

• Find a suitable location on the front fork for the sensor placement. If the cycling computer is on the handlebars, place the sensor on the fork on the same side as the computer. Polar recommends that the sensor not be placed more than 50 cm (19.5 inches) from the computer. The sensor should be at a 90-degree angle from the sensor.

Attach Sensor to Fork

• Select a rubber part to attach to the sensor that will fit the bike fork. The sensor may be attached using either cable ties or an O-ring. If using cable ties, pass the ties through the holes on the sensor and the rubber part. Attach loosely for now to allow for final adjustments. Make sure the Polar logo is facing out for proper functioning.

Alternative attachment

• The sensor may also be attached to the fork using a rubber o-ring. If this method is used, make sure the Polar logo is facing out and trim off any excess rubber from the o-ring.

Spoke Magnet Attachment

• The spoke magnet will need to be attached at the same level as the speed sensor. Ensure that the magnet hole is facing the speed sensor. Loosely attach the magnet to the spoke and tighten with a screwdriver. Do not fully tighten the screw yet.

Make Final Position Adjustments

• With both the speed sensor and spoke magnet aligned, make final adjustments to their positions. The spoke magnet should pass close to the sensor but it should not touch it as the wheel rotates. Make adjustments to the sensor position to bring it as close to the magnet as possible. Polar recommends that the maximum distance between the magnet and sensor not exceed 4 mm. Once the final position has been established, tighten the magnet screw and the cable ties, and trim off any excess cable tie.