Yding User Manual

The information in this Yding User Manual is subject to change without notice. We reserve the right to change and improve the product and manual without obligation to inform about changes.

You are encouraged to visit the website for updates and supplementary information concerning the use and operation of this product.

A.     Specifications

  • Battery: Lithium Ion rechargeable, not-replaceable
  • Battery charging: Using standard 500mA Micro-USB phone charger
  • Wireless transmission: 2.4GHz, ANT+™ and Bluetooth® Smart (4.0)
  • Accuracy: +/-2% of measured power
  • Power measurement range: (watts): 0 – 1999
  • Cadence range (RPM): 30-200
  • Water resistance rating: IPX7 

Water resistance notice

The product is designed to provide excellent water resistance and tested to resist water ingress to the IPX7 standard (up to 1 meter). This provides outstanding water resistance for cycling conditions both off-road and on-road­, including stream crossing and heavy rain. Please keep in mind this is an electronic device inherently sensitive to water. There are limits to water resistance. Do not subject the product to direct spray from a high-pressure sprayer. It is possible for water to be forced past the seals and damage to the electronics may occur.

Battery notice

The product contains a Li-Ion battery. Do not try to replace the battery.

B.    Installation

Please install crankset as for any other crankset. Further installation instructions are available from the crankset manufacturer Samox, the manufacturer of bearings used, and your local bike mechanic.

C.    Charging

For charging use a standard Micro-USB phone charger. These are widely available and should be rated minimum 500mA (most common).

  • Remove the plastic cap
  • Connect the phone charger to the micro-USB connector
  • Observe the light turns red to indicate charging and leave it to fully charge as indicated by the light turning off
  • Mount the plastic cap again. Observe this is a key point in keeping the product watertight and the o-ring should be clean of dust and particles, and slightly greased for best performance.

Deep Discharge Warning:

If leaving the power meter unused for longer periods, make sure to maintain at least 40% charge on the battery by charging the battery from time to time. This avoids risking the battery going into a deep discharge state which will require an expensive repair (not covered by warranty).

D.     Turn on the Power Meter

In order to conserve power, the power meter will automatically turn off after 5 minutes of no crank rotations.

To turn on the power meter, simply turn the crank 1-2 rotations either way with the bike in the upright position.


Charge for 30 seconds and then disconnect Micro-USB cable again.

This procedure will reset the power meter, which may be required in case an unexpected lockup/hang/freeze/crash should occur.

The power meter is always turned off while charging and will turn on after the charging cable is disconnected.

Short green blinks from the LED will indicate the power meter is turned on.

The battery level is best checked using the Team ZWATT app. Battery level indications are also given through ANT+ in fairly corse steps.

E.     Pairing

Using ANT+ on Bike Computer or Smartphone

Connect the power meter with any device that is ANT+ compatible and supporting the PWR profile (most bike computers, some sports watches and certain types of smartphones).

Pairing can be done automatically by searching for power meters nearby – this may not work well if other power meters are located nearby. The recommended method for Garmin bike computers is to do this once far away from other ANT+ devices and read off the ANT ID number (up to 5 digits). Then enter this value manually in the ANT+ device (bike computer, sports watch or smartphone).

Using BLE on Smartphone

Turn on Bluetooth on the smartphone and for some versions of Android, also turn on location. Search for devices on the app. The ÿding will show up with a name ID in the form of ZW53-xxxxx, where the 5 x’s, is specific for your ÿding and is the same number used as ANT+ ID number).

F.    Calibration / Zeroing

Calibration is done to set the zero offset of the highly sensitive torque measurement. There is no need to calibrate the power meter for every ride. Calibration is recommended after any mechanical changes to the crank arm such as tightening of bolts etc.

F.1    Calibration Process

  • Turn on the power meter.
  • Place the bike in an upright position. Rotate the crank to put the crank arms a vertical position with the left crank arm pointing straight down towards the ground. Do not put any weight on the pedals.
  • Using an ANT+ bike computer, follow the instructions for the bike computer to send the CALIBRATE command. Typically under Settings/Bike Settings/Bike Profiles/Bike/ANT+ Power
  • Using a smartphone connected through BLE, use the Team ZWATT app and select Calibrate in the menu.

G.    Training Use

After pairing the power meter to the bike computer or smartphone of your choice, the following fields of data should be available:


Twice the power measured as the effort by your left leg is a very accurate way to measure pedaling power. If you have a previous injury or other known imbalance, between the left and right legs, this can be compensated in the app under settings. Most people will not need to do anything here.


Cadence is measured by built-in accelerometers (no magnets) in RPM (revolutions per minute).

Torque Effectiveness (left leg)

The ratio between total torque and negative torque delivered in a single crank rotation. This value increases as you decrease the negative torque typically seen on the up-stroke of the foot (need to be clipped in to do this).

Pedal Smoothness (left leg)

The ratio between total torque and maximum torque delivered in a single crank rotation. This value increases when the torque throughout the entire crank revolution gets more equal.

H.      Maintenance

As a minimum, it is recommended to inspect the product for damage including cracks, dents, and serious scratches after all rides and after transport.

Check bolts etc. for correct torque on a regular basis.

To get the most out of your ÿding, keep the firmware updated. The Firmware and Software Updates page lists the latest versions available for update through the Team ZWATT app.

I.      Inside The Power Meter

Taking the power meter apart will almost certainly damage it – and will void the warranty. Also, the calibration will have to be repeated at the factory.

There are no repairable or replaceable parts inside and no spare parts are made available.

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