Quick Tips

How to Do Advanced Spindown Calibration on Wahoo KICKR and SNAP

Advanced spindown 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 that regular spindown can’t fix.

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 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 on your phone and open the Wahoo Fitness iOS App.
  5. Under Linked Sensors, make sure your KICKR is paired. If not, tap on the Linked Sensors area and pair your KICKR.
  6. Under the list of Linked Sensors, tap on the KICKR and you should see the perform spindwon option. Tap on that and follow the instructions.

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

Generally, you don’t need to perform advanced spindown often and the regular calibration should suffice. Also, according to Wahoo, doing advanced spindown often can cause some damage to the internals of your KICKR. So only do one if instructed or if the regular spindown doesn’t resolve your issue.

To Perform Advanced Factory Spindown Calibration:

  1. Ride your KICKR for about 10-minutes to warm it up.
  2. Open the Wahoo Fitness app and make sure your KICKR is paired.

3. Select KICKR for your Workout Profile

4. Start a Workout and select the little Radio icon on the top left of the screen.

5. Tap the wrench icon next to Wahoo KICKR.

6. On the spin down screen, tap 5 times on the paragraph on top of the Perform Spindown button.

7. You should see “Perform Factory Spindown button. Tap that and follow the instructions.

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

Hope you find this helpful and thank you for reading!

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14 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).

      • I don’t know the exact answer to this but I think they didn’t want customers to run the advanced calibration all the time and shouldn’t be used that way. The normal calibration should be sufficient 99% of the time.

        • Great input on this site which will hopefully sort out the low power issues I seem to be experiencing on my Kickr Snap V2. I cannot seem to open the Advanced Spindown mode in the iOS Wahoo app on my iPhone? Tapping / clicking in excess of 5 times on the recommended paragraph does not bring up any hidden options? Much appreciated, Will

          • They removed it the ability to do advanced calibration in the latest app update. If the normal update doesn’t address the accuracy issue, I would reach out to Wahoo support.

  • 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.

    • Travis,

      I have the same issue. My trainer is easily 50 watts low and we have another snap that is accurate, plus an inRide that tracks the working snap within 2-3%. What was the final outcome of your problem? My FTP at the bike shop using a compu-trainer tracks well with the working Snap and inRide. Definitely an issue.

  • Turns out Wahoo *moved* the location of the Factory Spindown feature in the newest version of the iOS app. From Wahoo Support:

    iOS:

    1. Open the iOS Wahoo Fitness App and navigate to the Sensors section
    2. Connect to KICKR from the sensors screen and save, selecting your preferred profiles
    3. Return to home page to select a KICKR-enabled profile and start a workout
    4. Tap the sensor icon in the upper left, then the wrench & hammer icon next to the KICKR
    5. Tap the instructions (above “Perform Spindown”) five times – new factory spindown instructions will appear below
    6. Tap Perform Factory Spindown (may require scrolling down on smaller screens) and follow the steps on-screen to complete the factory spindown*

    Good luck!