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How to calibrate your trainer

Zwift supports calibration for certain trainers over the ANT+ FE-C and native Bluetooth Low-Energy 4.0 (BLE) protocols so that you can get the most accurate performance for your trainer before starting your ride. This functionality is not available over the older ANT+ protocol or bridged Bluetooth connections (Zwift Companion app).

Note that the calibration feature may take one or two runs before the capabilities of your trainer are properly detected by Zwift; and until then, the button on the pairing screen may not be visible.

Here's a table of the trainers that are currently supported, and over which protocols:

Trainer Name ANT+ FE-C BLE
Wahoo KICKR Y Y
Wahoo KICKR 2016 Y Y
Wahoo KICKR SNAP Y Y
CycleOps Hammer Y Y
CycleOps Magnus Y Y
Tacx Flux Y  
Tacx Vortex Y  
 Minoura Kagura Y  Y
Jet Black Whisper Smart Y Y

Note that the older ANT+ protocol may show up for some of these trainers, and the calibration function will not work unless you pair over ANT+ FE-C, so be sure to select the FE-C pairing option.

 

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If the calibration option is available for your trainer, you'll see a wrench next to the "Unpair" button on the pairing screen after you've connected your trainer. Click it to open the Calibrate Spindown window.

 

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Once you've read the instructions, select Next.

 

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Accelerate to the appropriate speed...

 

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...and stop pedaling until the flywheel stops spinning.

 

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Congratulations! You'll be taken back to the pairing screen, and then you can start your ride.

 

FAQ

Q: The calibration button isn't showing up for me. What's up?
A: It may take a couple sessions for the button to show up. If you don't see it right away, try waiting a couple minutes; and if it still doesn't show up, you can also try restarting Zwift.

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