Quick Tips

How to Do An Advanced Spindown Calibration on Wahoo KICKR and SNAP

Advanced spin down isn’t needed on a regular basis but in some cases, it’s required to set the brake strength. Generally, you don’t need to do another one unless you start seeing a drift in power reported or leave your KICKR unplugged for an extended period of time.

Wahoo KICKR and SNAP require calibration for accurate performance. The KICKR, might require normal calibration once every 7 to 10 business days. However, the KICKR SNAP requires calibration before every ride for accurate power measurement.

Normal calibration is usually done using the Wahoo Fitness app which you can download from the iTunes store or Google Play for Android. Calibration takes only a few seconds but for best results, it’s recommended to warm up your trainer for about 10-minutes before performing the actual calibration.

To Perform a Normal Spindown on KICKR or KICKR SNAP follow these steps:

  1. Plug in your KICKR SNAP Power Trainer if you haven’t already.
  2. Ride for 10-minutes
  3. Make sure your trainer isn’t connected to any other app or device via Bluetooth. The blue light on the trainer should be blinking if it’s not paired to any device. Bluetooth can only pair to one device at a time so you will not be able to find it in the Wahoo Fitness app if your trainer is connected to something else.
  4. Ensure Bluetooth is turned on and open the Wahoo Fitness iOS App.
  5. Select “Sensors” in the bottom left corner
  6. Select the KICKR or KICKR SNAP from the list of saved sensors, then “Spindown”
  7. Select “Perform Spindown” and follow the instructions in the app

It’s recommended that you warm up your trainer for about 10 minutes before performing the spindown calibration.

For the KICKR SNAP, to get the best calibration results, make sure you do the following:

  1. Tighten the roller against the bike’s tire to prevent tire slip. To set the correct roller tension against the tire, use your hand to hold the flywheel stationary and attempt to rotate the bicycle wheel with your other hand. Wahoo recommends 2 full turns.
  2. Aim for a spindown between 9-16 seconds. If your spindown number is less than 9 seconds, you will need to loosen the tension. If more than 16 seconds, you will need to increase the tension. Add another 1/4 turn and do another spindown.

ADVANCED SPINDOWN CALIBRATION

Wahoo Fitness removed the option for Advanced Spindown calibration from the app. The option isn’t even listed in their KICKR support page. However, there is still a mention of it in the KICKR SNAP support page.

Advanced spin down isn’t needed on a regular basis but I had to do one on almost every KICKR I’ve had. You probably should do one when you first get your KICKR or KICKR SNAP to ensure the brake factor is correct. Generally, you don’t need to do another one unless you start seeing a drift in power reported or you leave your KICKR unplugged for an extended period of time.

To Perform an Advanced Factory Spindown Calibration:

  1. Ride your KICKR for about 10-minutes to warm it up.
  2. In the Fitness app go to Sensors -> KICKR -> Spindown.
  3. Tap on the paragraph above “Perform Spindown” five times to populate the Advanced Spindown option and follow the instructions on the screen.

Once you perform the advanced factory spindown calibration, your brak strength should be set correctly and power should be more stable.

Hope you find this helpful and thank you for reading!

 

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8 Comments

  • “Secret” advanced option gone on current Android version? Tried clicking 5 times in various locations including the one specified without success.

    • I just checked with different users who have the latest Android version and were able to see the advanced calibration option. Can you try again and maybe do a reboot of your phone?

  • Hi,

    I’ve been having major fluctuations with my power numbers using the kickr snap on zwift. I do a spindown every time I ride. When doing my calibration on the wahoo app do I need to select any of the erg Speed simulation or erg power smoothing if not using erg mode? When should these be selected? Would having these selected cause lower power numbers ? Should I do he factory spindown to correct these with nothing selected?

    Thanks.

    • I would definitely do a factory spin down to reset the brake on your Snap. Hopefully you will see better numbers after the spin down. You only need to do it once and then just do the regular spin down before every ride.
      As for the other settings, you don’t need to do anything with those when doing a spin down. Same if you are using Zwift or any other app to train.

      • Okay thanks !

        I did the factory spin down and then a normal spin down and the numbers are looking better however still not great. I rode my friends kickr direct drive and I’d say about 150 watts on snap is equivalent to 200 watts on the direct drive. Very frustrating. I’d expect some kind of power difference but not a gap this large. Maybe just the kickr snap is just not very accurate?

        Cheers

        • Tough to say without comparing against an actual powermeter. The only other thing I would check is your spindown time. Make sure it’s between 9-16 seconds. If your spindown number is less than 9 seconds, loosen the tension by 1/4 turn. If more than 16 seconds, increase the tension by 1/4 turn and do another spindown.

  • From wahoo support.:
    “Android Steps:

    1) Open the Wahoo Utilities app.
    2) Make sure the Wahoo KICKR is powered on.
    3) Click on the Wahoo KICKR when it pops up.
    4) Wait for the KICKR to connect, once connected tap the grey icon of the device with the Bluetooth emblem in it 10 times to bring up the hidden menu.
    5) Select the advanced spindown calibration and follow the steps.

    If the resistance is too high to pedal during the warm up period, please skip this part and wait until the spindown process begins. The app will have you perform 2 spindowns in a row. Once complete, please take a screenshot or record the results (time, temp and brake strength).

  • Thanks for the info. My new snap is 50 watts low as well. Going to try the steps listed below and see if I can recalibrate it correctly. When I do the spin down the results are always around 20 seconds. Will take over 3 full turns to get the spin down time to 15 seconds and that seems like a lot of pressure on the tire.