The power sensor should be installed on the center of the
drive side chain stay. The measurement is most accurate when the
chain runs just over the power sensor's center axis. The accuracy
decreases when the chain is skewed or when the chain runs over the
left or right side of the power sensor.
Place 2 rubber pads on the center of the drive side chain stay
and then place the sensor on the pads. You should be able to read
the Polar logo from left to right, when you are on the drive side
of your bike, with the chain speed sensor cable leading toward the
back of your bike. Place the "middle" notch, located on the side
of the power sensor, in the middle of the chain stay. Thread the
zip ties through the holes located on the bottom of the power
sensor, wrap around the chain stay and fasten loosely. Make
sure you do not wrap the zip ties around the rear derailleur
cable.
* Do not tighten the zip ties of the sensor
fully before installing the crank magnet.
When the drive side crank is in the 9 O'clock position,
install the crank magnet on either the bottom or top side of the
crank near the pedal. Make sure you place the rubber pad between
the sensor and the crank, and fasten loosely. To ensure successful
transmission of cadence signals, the crank magnet should pass the
cadence notch, located on the side of the power sensor towards the
front. Make sure the crank magnet does not touch the chain when
the chain is on the smallest rear cog and large chain wheel.
Fine-tune the position of both the crank magnet and the power
sensor so that the magnet passes the sensor closely but does not
touch it. The maximum distance between the power sensor and the
crank magnet should be 7mm or .3 inches. Cut off any excess zip
tie ends.
TIP: To save any damage to the power sensor cables when doing up the cable ties, you can intially wrap them with insulation tape and then cable tie over the top.
Power Output Set
Installation